The 2011 Billboard Music Awards took place in Las Vegas last night with performances from Cee-Lo, Black Eyed Peas, Ke$ha, Niel Diamond and Lil Wayne as well as a "surprise" collaboration between Rihanna and Britney Spears. It wasn't her only collaboration of the evening either, she also got up on stage with Nicki Minaj. The piece de resistance was, of course, Beyonce, who made the rest of them look like amateurs.

Below are some of the night's best bits, along with the list of winners. To see photos from the white carpet, go to Celebrity Gossip.

Billboard 2011 Award Winners
Top Artist of the Year: Eminem
Top Hot 100 Song: Taio Cruz - Dynamite
Top Billboard 200 Album: Eminem - Recovery
Top New Artist: Justin Bieber
Top Touring Artist: U2
Top Duo/group: The Black Eyed Peas
Top Country Album: Taylor Swift - Speak Now
Top Rap Album: Eminem - Recovery
Top Rock Album: Mumford & Sons - Sigh No More
Top Social Artist: Justin Bieber
Top Digital Song: Taio Cruz - Dynamite
Top Radio Song: Bruno Mars - Just The Way You Are
Top Streaming Song (Audio): Nelly - Just A Dream
Top Streaming Song (Video): Justin Bieber feat. Ludacris - Baby
Top Billboard 200 Artist: Taylor Swift
Top Hot 100 Artist: Katy Perry
Top Digital Songs Artist: Katy Perry
Top Radio Songs Artist: Rihanna
Top Streaming Artist: Justin Bieber
Top Digital Media Artist: Justin Bieber
Top Male Artist: Eminem
Top Female Artist: Rihanna
Top Rap Artist: Eminem
Top Pop Artist: Lady Gaga
Top R&B Artist: Usher
Top Rock Artist: Train
Top Alternative Artist: Mumford & Sons
Top Country Artist: Taylor Swift
Top Latin Artist: Shakira
Top Dance Artist: Lady Gaga
Top Christian Artist: Chris Tomlin
Top Pop Song: Taio Cruz - Dynamite
Top R&B Song: Usher feat Will.I.Am - OMG
Top Rap Song: Eminem feat Rihanna - I Love The Way You Lie
Top Country Song: Lady Antebellum - Need You Now
Top Rock Song: Train - Hey Soul Sister
Top Alternative Song: Neon Trees - Animal
Top Latin Song: Shakira - Waka Waka (This Time For Africa)
Top Dance Song: Edward Maya & Vika Jigulina - Stereo Love
Top Christian Song: Chris Tomlin - Our God
Top Pop Album: Justin Bieber - My World 2.0 Best R&B Album: Usher - Raymond V Raymond
Top Alternative Album: Mumford & Sons - Sigh No More
Top Latin Album: Enrique Iglesias - Euphoria
Top Dance/Electronic Album: Lady Gaga - The Fame
Top Christian Album: Skillet - Awake
Viral Innovator of the Year: Cee Lo Green
Icon Award: Neil Diamond
Millennium Artist Award: Beyonce