• Hailey Baldwin Bieber was photographed rocking an edgy super short black bob for a recent photoshoot.
• Without her signature blonde hair, the model is almost unrecognizable.
• She was also photographed in her classic mid-length hair and an oversized jean jacket.

• Visit Insider's homepage for more stories.

There are some celebrity hair changes that look fresh and new but not all that different. Maybe it's a bit of face-framing highlights or a few inches off long hair. But Hailey Baldwin's black bob could not be more different. The 22-year-old model showed off the look in a photoshoot for Interviewmagazine for its September 2019 issue. The caption reads: "There's something about Hailey. The first lady of pop @haileybieber." It's a nod to her year-long marriage to Justin Bieber. While fans don't appreciate her being called the "first lady of pop," (most seem confused about the difference between the princess of pop and first lady, TBH), they are loving her hair.

"Ooooh she's edgy," wrote music exec Allison Kaye when Baldwin posted the photo on her own account. "Ooo the dark hair looks good!" said photographer Devyn Galindo. "DARK HAIR HAILS" wrote a fan. It's not just the black hair, though. This is also the shortest we've seen Baldwin's hair, though she does love a chic bob.

The new look is obviously a wig since Baldwin was back to her mid-length blonde hair the next day—or the next hour, actually. Another shot from the magazine shows her looks stunning back to her '90s lobin a honey blonde hue.

Wigs are a great way to switch up your look without totally destroying your hair. Even if you're not modeling for a magazine, you can totally rock some faux-hair for a day. Check out this guide for first-time wearers and then shop from one of these trustworthy online sellers.

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• Ivanka Trump sported a sleek new bob as she touched down in Bogotá, Colombia, on Monday night to promote her Women's Global Development and Prosperity Initiative. 
• It is Ivanka's shortest haircut in nearly 15 years. She had become known for wearing her long blonde tresses sleek straight and parted down the middle. 
• Ivanka last had a bob in 2005.
• She told Forbes in 2013 that she cut her hair short at the time to try and fit into her father's predominantly male New York real-estate company. 
• Visit Insider's homepage for more stories.

Ivanka Trump has a brand new 'do, and it's the shortest haircut she has sported in nearly 15 years. 

Donald Trump's eldest daughter sported a fresh bob as she arrived in Bogotá, Colombia, on Monday night. 

Ivanka, who works as a senior adviser for her father, is currently touring South America to promote the Trump administration's Women's Global Development and Prosperity Initiative (WDGP). 

Photographers first got a peek of Ivanka's sleek new hairstyle as she boarded the plane for Colombia from Joint Base Andrews in Maryland on Monday. 

Alexa Rodulfo, Ivanka's longtime hairstylist and makeup artist, designed the bob and cut Ivanka's hair before the trip, it was confirmed to Insider. 

She sported a navy-blue J. Crew dress with a thick red belt, and accessorized the look with gold hoop earrings. 

Ivanka, 37,  later changed into a $395 pleated white suit-dress designed by Badgley Mischka, according to the Daily Mail. 

She paired the chic look with matching white heels and silver earrings as she descended the plane in Bogotá, where she was greeted on the runway by Colombia's Vice President Marta Lucía Ramírez. 

It was then that Ivanka's bob began making waves on social media, shocking followers who had grown accustomed to her signature long blonde locks almost always worn straight and parted down the middle. 

Since she first began appearing at galas in New York alongside her famous father as a child, Ivanka has always favored long tresses. 

In fact, the only time in the last two decades that Ivanka has sported short hair was when she chopped her locks into a bob in 2005. 

Ivanka later revealed that she had decided to cut her hair short after joining the Trump Organization in 2005 and found herself in a predominantly male New York real-estate office. 

"I tried to assimilate," she told Forbes in 2013. "I wore my hair in a bob. I wore a black pantsuit." 

Ivanka has long since embraced color in her wardrobe again, but it remains unclear what inspired the fresh haircut. 

On Tuesday, Ivanka launched the Academy of Women Entrepreneurs in Colombia as part of her WGDP initiative. 

"I was honored to meet the 1st participants — a dynamic group of 40 women entrepreneurs!" she wrote on Instagram. "These courageous women have all overcome significant hardship to be where they are today. Like Colombia, they are not looking backward, they are looking forward." 

"These formidable women embody the spirit of the future, and I look forward to seeing your successes influence our world for the better."

Ivanka then visited the General Santander Police Academy to pay tribute to the 22 cadets who were killed in a terrorist attack at the academy on January 17. 

She will have dinner with Colombia's President Iván Duque Márquez on Tuesday night. 

• Read more:
• The stars of 'Will & Grace' are being called 'fascists' for suggesting a list of attendees to a Hollywood Trump fundraiser should be made public
• Trump said he skipped a diplomatic trip to monitor Hurricane Dorian. Then he spent the weekend golfing.
• Photos appear to show Prince Harry avoiding Trump at Buckingham Palace after the president said Meghan Markle was 'nasty' about him
• Ivanka Trump gave her daughter a puppy named Winter for her 8th birthday

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• How often you should get your hair trimmed can depend on both your hair type and the amount of wear and tear your hair goes through.
• Emma Fitzgerald, owner of Salon Très in Joliet, Illinois, told Insider that people with long hair require more regular trims because of the damage that restyling can do to strands.
• The hair expert recommends that those with a shorter style should get a trim every four to six weeks.
• While some salons suggest that those with tight curls should have their hair trimmed every five to six weeks, Fitzgerald says it's possible to push appointments to every 12 weeks.
• Visit Insider's homepage for more stories.

Unsure of when to book your next haircut? The answer is a little more complicated than you might expect.

Turns out, how often you should be getting your hair trimmed can depend on both your hair type and the amount of wear and tear it's put through.

Emma Fitzgerald, owner of Salon Très in Joliet, Illinois, told Insider that everything from your hair texture to styling habits can affect how much time should go by before your next hair appointment.

Here's what Fitzgerald recommends, depending on your hair type.

Emma Fitzgerald (not pictured), the owner of Salon Très in Joliet, Illinois, recommends getting long hair trimmed every eight weeks to keep it healthy.

People with long hair require more regular trims because of the damage done to their strands through restyling, according to Fitzgerald.

"In most cases when people have longer hair, they'll throw it in a ponytail to work out but then they're not ready to wash it, so they'll come home and restyle it — whether by teasing it, brushing it, curling it, or smoothing it," Fitzgerald said. "It's just more hair to manage, and so therefore, they require more frequent haircuts."

The salon owner noted that people with long hair can also be prone to playing with their hair a lot, which can lead to breakage. That's why she suggests seeing a stylist every eight weeks to keep long  hair healthy.

It's easier to maintain a shorter hairstyle with visits to the salon every four to six weeks, according to Fitzgerald.

Fitzgerald recommends that those sporting a shorter look still have their hair trimmed regularly, making an appointment every four to six weeks.

"It's basically about image," she said. "It's not necessarily about the wear and tear. It's just about keeping that hairstyle looking like it's in tip-top shape."

Fitzgerald recommends that those with coarse and curly hair have it trimmed every 12 weeks.

Good news for those who fall into this category: According to Fitzgerald, you don't need to get your hair cut very often.

"We suggest those who have a tight curl and coarse texture to their hair push it closer to 12 weeks just because the natural oils of their scalp travel down the hair strand and the oils help them naturally maintain a healthier stronger hair follicle," she said.

Some salons may advise having slightly more regular appointments. For example, Ouidad, a salon with a focus on curly hair, recommends having a trim every six to eight weeks to prevent split ends and knotting.

If you have fine hair, you might want to get your hair cut every four to six weeks.

Whether it's wavy or straight, you should get your strands trimmed every four to six weeks if you have fine hair, according to Fitzgerald. It's really all about appearance, the salon owner says, since thinner hair can look limp or unhealthy without regular trims.

Fitzgerald suggests a visit to the salon every four weeks if you use heat tools in your hair a lot.

Using thermal tools may give you the hair of your dreams, but it can take a toll on your hair. Fitzgerald said that those who use heat usually need to get their hair cut every four weeks.

"The hair becomes damaged over time," she said. "The only way to really repair the hair is by cutting off the damaged part."

Of course, the less you use heat styling, the less often you need to get your ends trimmed.

If you get your hair colored, and take care of it, you can push your appointments to every eight weeks, Fitzgerald says.

If you get your hair colored but treat it with care (meaning you don't style it with heat often, you don't blow dry it, and you don't play with it all the time), Fitzgerald says you don't have to get it cut quite as often.

"If someone is coloring their hair and taking good care of their hair, it's going to closer to the eight-week mark," she said.

If you want your hair to grow, leave 10 to 12 weeks between salon visits.

You may have heard that if you want your hair to grow, you should get it trimmed often — but Fitzgerald says that's not necessarily the case. The best thing you can do is wait and let it grow for 10 to 12 weeks between appointments, the salon owner says.

"In most cases, that gets us past that clean line and gives us a little more length to transition to a new style," she said. She recommended putting your hair in a ponytail if you really want your hair to grow. "That way, you won't thermal style it and you won't play with it," she said. "That allows the hair to get stronger and grow."

• Facebook CEO Mark Zuckerberg's hair was a topic of conversation on social media as the tech CEO testified before Congress on Wednesday.
• One congresswoman even brought up his hair during the hearing.
• His hair inspiration might be Augustus Caesar, whom Zuckerberg has said he admires.
• Visit Business Insider's homepage for more stories.

While Facebook CEO Mark Zuckerberg was testifying about the company's Libra cryptocurrency before the House Financial Services Committee on Wednesday, some viewers were focused on policy — but others were focused on his hair.

Rep. Katie Porter even brought up his hair during the hearing.

One person on Twitter pointed out that the short haircut might have something to do with Zuckerberg's fascination with Augustus Caesar, the first-century Roman emperor.

In a 2018 New Yorker profile, Zuckerberg revealed his admiration for the emperor — he and his wife, Priscilla Chan, even went to Rome for their honeymoon.

"My wife was making fun of me, saying she thought there were three people on the honeymoon: me, her, and Augustus. All the photos were different sculptures of Augustus," he told The New Yorker.

Zuckerberg and Chan also named one of their daughters August.

That admiration may be why Zuckerberg's hairdo closely resembles the "Caesar" haircut, though the style is actually named after Julius Caesar.

But Augustus, Julius Caesar's great-nephew and adopted son, has similar hair in most statues depicting him.

Facebook did not respond to Business Insider's request for comment on where Zuckerberg drew inspiration for his 'do, so while we don't know for sure, it's possible the Caesars' iconic cuts were the source.

SEE ALSO: This game lets you roleplay as a tech CEO, and it was way harder than expected

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• The RëzoCut is a dry haircut for curly hair in which the hair is cut in a circular motion, resembling roses.
• The haircutting technique cuts each section differently to achieve a uniform shape and maintain curl integrity.
• Client Ambrosia Jones traveled from Atlanta to Westfield, New Jersey, to try the RëzoCut and dye her natural curls red for the first time.
• Visit Insider's homepage for more stories.

Following is a transcript of the video.

Nubia Suarez: When you cut curly hair, it's not uncommon of a changing of emotions. When she sees herself for the first time, it's a freedom.

Ambrosia Jones: I'm ready.

Nubia: Open your eyes.

Ambrosia: I've wanted this haircut for, like, a year now, and I came all the way from Atlanta, Georgia, to New Jersey just so I could get this RëzoCut.

So, the first time I heard about the RëzoCut was on Instagram. And I was like, OK, well, what's a RëzoCut? So, I looked at the hashtag, and I saw all these girls with different curl patterns, different hair.

And I was just like, I really want this cut. It was beautiful, voluptuous. The hair was just really big. And I was like, I want big hair, with this big face. So I figured I would try to get a RëzoCut.

Nubia: So, RëzoCut is a dry cut that is divided in triangles, cut in circles, to blend all the different textures for a great body, balance, and shape.

So, Ambrosia, are you familiar or do you know what type of texture do you have?

Ambrosia: No.

Nubia: You are a texture, for what I see, a good texture 3B or 3C. Depending on porosity or depending in how sometimes the hair could be dried, your hair could contract to a 4A.

And what that means: It could really look very tight. In the summer, it's going to be the tightest. In the winter, we lose some of that body.

Right now, your tightest texture will be on the top. The looser textures right now, they are at the bottom.

So, if we're going to create the crown, we're going to look to make sure that we're going to marry the top with the bottom, seamless.

Literally the technique that I teach all over to my stylists is cutting in roses, in flowers. It's when you cutting at a flower or when you pull a plumb in a rose, you wanna make sure that you're staying a nice, even flat.

The outside of that rose completely balance the inside of the rose. When they blossom, when they open up, they open up completely even, from the inside out.

Ambrosia: [gasps] Oh, my gosh.

Nubia: How do you love it?

Ambrosia: I love it. This is my lion's mane.

Nubia: That's right.

Ambrosia: I really feel like a Leo right now.

Nubia: We need to do something else that we agreed today.

Ambrosia: Yeah.

Nubia: Color.

Ambrosia: Yes.

Nubia: So, girl, we're going to get you ready for the color. And then, after that, transformation.

The secret behind how we create all these beautiful colors, it's, A, we take the time to do them.

We go step by step. We mix a lot of the oils that we have here to apply colors. We add protein. We add moisture to it.

Ambrosia: All right, I'm ready.

Nubia: Open your eyes.

Ambrosia: Oh, my God! Shut up. Oh, my God, that's me!

Nubia: How beautiful.

Ambrosia: I've never seen my curls look like this before, honestly.

Nubia: You are so beautiful, Ambrosia.

Ambrosia: I waited a whole year for this. Thank you.

Nubia: I hope my curly girls will never have to anymore tell no one that they are beautiful. I want a world that is going to accept and embrace all of us as a humankind.

Ambrosia: I feel like this cut has enhanced my natural curl pattern.

If you look at the back of my hair, it actually looked like there was actually three levels to it, and she took everything and smoothed it out, and it all became one. And I love that.

I was natural before natural actually became "in." And I didn't have anywhere to go, and everywhere I did go, I had to get my hair straightened.

So, now, during the wintertime, I don't have to get my hair straightened. I can wear it curly because I have a curly cut now.

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