Pictures: Miley Cyrus No. 1 on Maxim Hot 100

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Ever since Miley Cyrus and Kelly Osbourne co-starred in "So Undercover," the girls have been each other's greatest defenders, each taking turns standing up for the other via -- what else? -- Twitter.

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These two met on the set of "The Last Song" and had a whirlwind romance and engagement, then split in 2013.

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Premise: Pop star/actress Miley Cyrus and professional dancer/Cyrus friend Mandy Jiroux hang out, goof off and act like teenage girls. Except one of them is a successful Hollywood commodity, so they're not quite like your friends from high school. Website: www.youtube.com/user/mileymandy

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Singer Miley Cyrus attends her book signing of "Miles To Go" at The Grove's Barnes and Noble book store on March 7, 2009 in Los Angeles, California.

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The couple reportedly called off their engagement amid cheating rumors.

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Miley Cyrus has a chic new look at the People's Choice Awards on Jan. 11.

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Singer/actress Miley Cyrus attends the opening of TOPSHOP/TOPMAN in Chicago September 8, 2011

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Singer-actress Miley Cyrus arrives at the 81st Annual Academy Awards held at Kodak Theatre on February 22, 2009 in Los Angeles, California.

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Miley Cyrus is no stranger to criticism for her sexually charged image, but the singer and actress wants you to know she's not ashamed. In fact, she thinks sex is pretty awesome. "The girls that really base how much they're worth on the sexual favors they can do for somebody, that makes me really sad," she told Lifetime. "Because sex is actually really beautiful. It's the only way we create, and it's the only way the world keeps going."

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Marc Jacobs, right, is nominated for womenswear designer of the year. He's seen here before his New York Fashion Week presentation with Miley Cyrus. New York Fashion Week fall 2013: Marc Jacobs review

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Miley Cyrus.

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Miley Cyrus and Rihanna attend the 2009 GRAMMY Salute To Industry Icons honoring Clive Davis at the Beverly Hilton Hotel on February 7, 2009 in Beverly Hills, California.

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Actress, singer, YouTube enthusiast Miley Cyrus is celebrating her 18h birthday today.

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Miley Cyrus said Sunday that she wasn't anorexic, but hinted that she was following a gluten-free diet. Medical experts caution that the diet isn't healthy for everyone.

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Miley Cyrus and Liam Hemsworth call off their engagement after cheating rumors surfaced. (Photo by Jason Merritt/Getty Images)

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WINNER: Miley Cyrus Selena Gomez Katy Perry Rihanna Kate Upton

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Whether Miley Cyrus and Liam Hemsworth have split up has been the topic of much rumor for the last week or so — with the talk hitting a fever pitch Wednesday morning as a report citing "multiple sources" pronounced, "It's over." But hours later, another outlet said not so fast. Wednesday afternoon, E! News joined the fray with a hold-on-a-minute report declaring that the two "have been a bit rocky, but are not giving up." The couple have been engaged since May 31 of last year, after dating for about three years. Although last week's stories were quick to cite Liam's alleged cozy conduct with actress January Jones at a pre-Oscars bash last month as causing a rift in the relationship, the New York Post's Page Six on Wednesday quoted a source suggesting that Miley's wild night life was to blame. Full story: Miley Cyrus, Liam Hemsworth split? Report says it's done, but... | PHOTOS: Celebrity splits of 2013

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Miley Cyrus.

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Singer Miley Cyrus, girlfriend of the film's Liam Hemsworth, poses on the red carpet.

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Singer Miley Cyrus arrives at the 51st Annual Grammy Awards at the Staples Center on February 8, 2009 in Los Angeles, California.

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She says it was Salvia. We say that's splitting hairs.

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Or maybe Miley Cyrus spilled something on her shirt (and pants) before she walked the red carpet, so she had to take them off and go with just the jacket? We know it's hot in Las Vegas, but we're pretty sure the MGM Grand Garden Arena is air-conditioned. -- Rick Porter, Zap2it

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Miley's new hair provides an opportunity for a distinctive look, so just dress weirdly and--voila. Miley is timeless costume fodder.

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Actress/singer Miley Cyrus backstage during Muhammad Ali's Celebrity Fight Night XIII held at JW Marriott Desert Ridge Resort & Spa March 24, 2012 in Phoenix, Arizona.

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An intruder broke into Cyrus' home while it was unoccupied.

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Looks as if Miley Cyrus has finally been tamed: The singer and actress is engaged to marry her beau, Liam Hemsworth. The young couple, who have been together for around three years, shared their happy news Wednesday. "I'm so happy to be engaged and look forward to a life of happiness with Liam," Cyrus told People, which first reported the engagement.

<a href="https://twitter.com/MileyCyrus/status/234898195845615617">@MileyCyrus</a>. Christopher Polk / Getty Images

While Miley Cyrus cropped her hair short and took out the color, Christina Aguilera left her locks long and added streaks of purple. Cyrus has gone for a platinum blond power-pixie cut. Aguilera showed off her new look Sunday at a media event for "The Voice." Full story: Christina Aguilera's hair: Bring on the color purple | Miley Cyrus' hair: It's platinum blond, and mostly gone!

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"LOL" was supposed to represent a big step for Miley Cyrus' movie career as she attempts to mature beyond Disney's Hannah Montana. Instead, it has turned into a tough lesson about how quickly a Hollywood studio can fall out of love with a movie. The Lionsgate studio has quietly decided to release "LOL" in seven cities on May 4, the same day as the sure-to-be blockbuster "Avengers," and without any marketing fanfare.

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Miley Cyrus, right, and her guest arrive at the Vanity Fair party.

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