Bieber fever has hit Los Angeles, as the young singing star's film received its premiere.
Hundreds of Justin Bieber fans - along with his famous friends Miley Cyrus, Will Smith, Usher and his reported girlfriend Selena Gomez - filled the LA Live complex for the screening of the teen pop star's first movie, Justin Bieber: Never Say Never.
The mostly tween and teen crowd, many in homemade T-shirts proclaiming themselves to be Bieber's number one fan, packed the LA Live plaza hours ahead of the screening.
Part concert film and part biopic, Never Say Never tells the story of Justin's rise from a small-town street performer to a bona fide pop sensation with hit songs, a best-selling book and more than seven million followers on Twitter.
Bieber fans - "Beliebers" - play a big role in Never Say Never. They're shown throughout the film in their T-shirts, singing along with his songs and crying from sheer joy at seeing him in person.
"I'm so happy I have such amazing fans," Justin said as he introduced the film. "Tonight isn't even about me. It's about spreading the message that anything is possible."
Justin also joked about the plans he's got for his much-talked about hair, saying: "I think I might grow it out long to my knees!"
Disney star Selena, who was snapped kissing and cuddling Justin last month, kept a distance from him on the red carpet, stopping to sign autographs for fans.
And it seems Selena might have to spend most of St Valentine's Day on her own. "I'm going to surprise my fans in a movie theatre," Justin revealed of his plans for February 14th.
Justin Bieber: Never Say Never is released in the UK and Ireland on February 18, 2011.