From Lady Gaga's drag performance to Bruno Mars' touching tribute to Amy Winehouse, see which moments stole the show
No Swift Moves
"Now, this is a time when you want to interrupt me, Kanye," Katy Perry joked as she accepted her award for Best Collaboration, referencing West's 2009 incident with Taylor Swift. "Oh my goodness, it's nothing like your first time. Your first Moonman, right?"