Our favorite bit? When he donned a wig and orange suit to challenge Psy to a dance-off. The music: the South Korean singer's new hit "Gentlemen."
Justin Bieber gets booed
Thousands of Beliebers might have voted for Justin Bieber to win the Milestone Award at the 2013 BBMAs, but that didn't keep some rabble-rousers in the audience from booing him when he took the stage.
Bieber was visibly taken aback by the mixture of cheers and jeers. We almost thought he'd just leave the stage, but instead he shot back with a defiant speech.
"I'm 19 years old. I think I'm doing a pretty good job," Bieber told the crowd. "Basically from my heart I really just want to say it really should be about the music. It should be about the craft that I'm making. This is not a gimmick and I'm an artist and I should be taken seriously."
Taylor Swift has been the butt of a million jokes about her relationship history. The 23-year-old singer finally took back the power at the 2013 BBMAs when she accepted her Top Billboard 200 Album award for Red.
"You're the best and longest relationship I've ever had," she said while thanking her fans.
You get a +100 for being self-aware, Taylor!
Nicki Minaj gives Lil Wayne a lap dance
Nicki Minaj let it all hang out when she took the stage with Lil Wayne to perform their collaboration, "High School." The American Idol judge even gave the rapper a lap dance right on stage — with a lot of emphasis on her behind.
We'll give her one thing: She knows how to move on stage.
Tell us: What was the craziest moment at the 2013 Billboard Music Awards?