Justin Bieber and Selena Gomez

Beiber, who took home six Billboard awards, made news by kissing girlfriend Selena Gomez for the first time in public after it was announced he'd won the top new artist award.
Beiber, who took home six Billboard awards, made news by kissing girlfriend Selena Gomez for the first time in public after it was announced he'd won the top new artist award.
Host and The Hangover Part Ii star Ken Jeong and country musician Keith Urban performed a banjo duel during the show. "We worked on ideas for about a month," said Jeong after the show. " For me, all comedians want to be rock stars, so to be able to hang out with some of these stars just for a little while is a lifetime of memories."
Matthew Morrison presented the Billboard 200 Album Artist of the Year award to Taylor Swift onstage at the show which was held in the MGM Grand hotel. "The fans have done it all for me, it¹s like I¹m constantly trying to think of ways to thank them," Swift told reporters after the show.
Britney Spears joined Rihanna onstage for a duet of the singer's hit "S&M." After the performance, the singers shared a kiss that was not shown on ABC's broadcast.
Singer Beyonce was presented with Billboard's Millennium Award by her nephew Daniel Julez and mother Tina Knowles.
Country musicians Charles Kelley, Hillary Scott and Dave Haywood accept the Country Song of the Year award. The trio also performed their new single "Just a Kiss" during the show. Asked about the pressure of following up their multi-platinum, Grammy Award-winning album Need You Now, Scott says, "We would be lying if we said it didn't weigh on us at points, but there's strength in numbers with the three of us. We're such good friends and we can lean on each other."
Cee Lo Green performed a medley of his hits including "Crazy" and "Forget You" while atop a flying piano in the MGM Grand's Garden Arena. Noted show director Louis J. Horvitz of the David Copperfield inspired illusion, "It was very dangerous."
The Millennium award winner performed her new single "Run The World (Girls)"which was met with thunderous applause.
Rappers Lil Wayne and Nicki Minaj, who both sang during the awards show, hung out backstage.
U2's The Edge (far left) and Bono (far right) struck a pose with Justin Bieber (center left) and The Black Eyed Peas' will.i.am (center right) backstage. All four musicians took home Billboard awards. Said Edge backstage: "Las Vegas is great for us, because it's a place where grown-ups can have childlike ideas."