Beyonce performs at the 2011 Billboard Music Awards. (Ethan Miller/Getty Images for ABC)

Eminem took home several awards, including Top Artist of the Year and Top Billboard 200 Album, while Swift won for Top Album Artist and Top Country Album. “The impact of an album is all determined by the fans,” Swift said after her first win. “You’ve just given me another reason to be completely in love with you.” Check out all the winners here.

Bieber may have won several awards during the show, including Fan Favorite, but his on-camera kiss with Selena Gomez is certainly causing the biggest stir. The Biebs smooched Gomez after winning Top New Artist, undoubtedly sending many Bieber Fever sufferers into a jealous rage.

In other kissing news, Rihanna and Britney Spears locked lips onstage after a pole-dancing performance of “S&M.” While Rihanna looked quite at home gyrating in white leather, Spears looked a tad uncomfortable throughout the performance.

First lady Michelle Obama, along with Stevie Wonder, Barbra Streisand and other big names in music, hailed the great and powerful Beyonce in a video, as she received a Millennium Award for her career achievements.

“This is a moment I have to soak in because it’s gonna be — and it is — one of the best moments of my life,” Mrs. Jay Z told the audience. The singer then performed her new single, “Run the World (Girls).”

(Gallery: The 2011 Billboard Music Awards)

Watch Beyonce, Britney and Rihanna perform below: