The 2011 Billboard Music Awards were held in Las Vegas this morning after a five year hiatus.

Britney and Rihanna opened the show with a performance of their number one hit S&M before the awards giving began in earnest.

Unlike other award ceremonies, Billboard honours are based on chart sales so there were not a lot of surprises when to the winners.

Justin Bieber and Eminem nabbed six awards each while Taio Cruz, Lady Gaga, Rihanna and Katy Perry all took home three trophies.

Beyoncé was also acknowledged as the biggest star of the new millenium with a special award.

Despite scoring seven consecutive US top 10 hits, Ke$ha failed to win anything but her performance of Animal/Blow (below) was a highlight of the ceremony.

Here’s a list of the winners:

Top Artist: Eminem

Top New Artist: Justin Bieber

Top Male Artist: Eminem

Top Female Artist: Rihanna

Top Duo/Group: The Black Eyed Peas

Top Digital Songs Artist: Katy Perry

Top Radio Songs Artist: Rihanna

Top Pop Artist: Lady Gaga

Top R&B Artist: Usher

Top Rap Artist: Eminem

Top Country Artist: Taylor Swift

Top Rock Artist: Train

Top Latin Artist: Shakira

Top Dance/Electronic Artist: Lady Gaga

Top Pop Album: Justin Bieber — My World 2.0 and Katy Perry — Teenage Dream

Top R&B Album: Usher — Raymond v. Raymond

Top Rap Album: Eminem — Revovery

Top Country Album: Taylor Swift — Speak Now

Top Rock Album: Mumford & Sons — Sigh No More

Top Dance/Electronic Album: Lady Gaga — The Fame

Top Pop Song: Taio Cruz — Dynamite

Top R&B Song: Usher Feat. will.i.am — OMG

Top Rap Song: Eminem Feat. Rihanna — Love The Way You Lie

Top Country Song: Lady Antebellum — Need You Now

Top Rock Song: Train — Hey, Soul Sister

Top Dance Song: Edward Maya &Vika Jigulina — Stereo Love

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