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Demi Lovato
Demi Lovato performs at the 2013 MuchMusic Video Awards at MuchMusic HQ on June 16, 2013 in Toronto, Canada
George Pimentel/WireImage
PSY doing "Single Ladies," Demi rockin' out, Drake's surprise, and Australian boy butts - Check out the best moments from this year's MMVAs
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MuchMusic Video Awards
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Demi Lovato
Psy
Drake
Avril Lavigne
Taylor Swift
Marianas Trench
Naya Rivera
Armin Van Buuren
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