Alex Moss/FilmMagicJustin Bieber caused a fan frenzy Monday when he touched down at London's Heathrow Airport. The 18-year-old crooner sent the crowd of mostly girls screaming as he made his way through the terminal wearing a baseball cap and headphones.

Pop star Justin Bieber's Tuesday night was all about being a good "Boyfriend." First, the 18-year-old dropped by "The Voice" where he previewed the first 45 seconds of the video for his more grown-up single, "Boyfriend," that has a vibe somewhat like Justin Timberlake's 2002 song "Cry Me a River." The Biebs announced that his new album, Believe, will be out June 19, and that he'll be back on stage for the singing competition's May 8 finale to perform "Boyfriend" for the first time on TV. What do you think of the video so far? I'm guessing from the annoyed look that "The Voice" judge Christina Aguilera gave after Justin hugged her that Xtina wasn't impressed with Bieber. (She responded via Twitter Wednesday that "the media loves spinning stories" and that she actually had "#BieberFever.")
Justin Bieber takes girlfriend Selena Gomez on a date. (Noel Vasquez/Getty Images)

Coachella — the annual outdoor concert held in Indio, California — was the place for young Hollywood couples to be over the weekend. Vanessa Hudgens and Austin Butler, Emma Roberts and Chord Overstreet, and more watched the performances by Radiohead, Dr. Dre & Snoop Dogg, and others, hit the many parties, and, of course, indulged in some PDA.
Vanessa Hudgens and Austin Butler (Ben Dome/Nathanael Jones/PacificCoastNews.com)Emma Watson and beau (Ben Dome/Nathanael Jones/PacificCoastNews.com)

Miley Cyrus is ready to leave the child actor label behind. (Jeff Kravitz/FilmMagic)You know those people who feel compelled to update their Facebook status anytime they have an emotion, like when they're fighting with a significant other or crushing on a new guy or gal? That's Miley Cyrus' character Lola, who's nicknamed Lol, in the upcoming movie "LOL." A new trailer for the film, just released this week, shows the star updating her friends via the social network with messages like "ex-boyfriend" and "new boyfriend??" as she experiences the ups and downs of a high school romance in the age of the Internet. The trouble starts when we learn that her boyfriend hasn't texted her lately because he's been hooking up with another girl, played by "Twilight's" Ashley Greene. Lola then finds herself attracted to the cheater's pal at the same time she's entering a downward spiral bad grades and arguments with her mom (Demi Moore).

Not since Justin Bieber has a teen pop act whipped up such frenzied fans as British boy band One Direction. After forming on the U.K. version of "The X Factor" in 2010, the five guys who make up the band — Niall Horan, 18; Zayn Malik, 19; Liam Payne, 18; Harry Styles, 18; and Louis Tomlinson, 20 — are quickly drawing comparisons to mega-successful all-male groups that came before them like *NSYNC, Backstreet Boys, and even that most legendary boy band of all, The Beatles. Their first album, Up All Night, went straight to No. 1 on the Billboard 200 chart when it was released last month, making it the highest chart debut of a British act ever.

Louis, Niall, Liam, Zayn, and Harry are 1D. (Michael Kovac/WireImage)

Jennifer Lawrence becomes a Barbie. (Barbie Collector)"The Hunger Games" has already etched a place in movie history, earning more than $460 million worldwide since it opened March 23. Now its star Jennifer Lawrence is being immortalized in another way: Mattel has turned her character, Katniss Everdeen, into a Barbie doll. Of course, this isn't your average Barbie, wearing a sparkly pink gown or bright red lipstick. Like "The Hunger Games" heroine in the books and movie, the doll version of Katniss is designed to be pretty badass! She's decked out in the outfit she wears during the movie's fighting scene, with her signature mockingjay pin on her lapel and her trusty bow and arrow slung over her back. The doll's designer Bill Greening told Entertainment Weekly that his team examined Lawrence's actual costume from the film to make sure every aspect of the toy was perfect. "The doll's minimalistic style and details — such as her loosely braided hair and makeup-free look — also really embody the heroic character Katniss," he told EW.

Ben Watts/SeventeenThat cute little guy we know as Justin Bieber isn't so little anymore. In case you haven't noticed, the Biebs, who turned 18 last month, is quickly becoming more mature, and seems to be making more sense almost every time he opens his mouth. The "Baby" singer shared some of his pearls of wisdom in a new interview with Seventeen magazine.

First, Bieber spoke openly about his career, which only seems stronger after his successful holiday album, Under the Mistletoe, and his latest hit single, "Boyfriend." Although a lot of people have questioned whether the pint-sized pop star will be able to hold on to his fans as he ages, Justin doesn't sound worried about it at all. "A lot of times, when artists grow older, they lose their younger fans because they're just trying to get older fans," he reveals to the mag. "But if you try to make good music, then you'll just appease everybody. I just want to make music that's good for everybody."

Katy covers Teen Vogue.If you listen to pop radio at all, then you know singer Katy Perry is already everywhere with hits like "Firework," "E.T.," "Last Friday Night," and the list goes on and on. Soon, however, she'll also be coming to a movie theater near you, starring in a new documentary/3D concert film about her latest tour that Katy swears will give us a different perspective about her. "One of my main reasons for doing this is that people think of me as though I'm Dorothy in the ruby slippers," she tells Teen Vogue, referring to "The Wizard of Oz." "I want them to see everything else that's involved. Yes, I am her, but at the end of it all, I'm also the guy behind the curtain."