Beyoncé and Jay Z perform "Drunk in Love"
Kendrick Lamar and Imagine Dragons perform "M.A.A.D. City"
Katy Perry performs "Dark Horse," featuring Juicy J
Pharrell Williams, Daft Punk and Stevie Wonder perform "Get Lucky"
Lorde sings "Royals"
33 couples get married while Macklemore and Madonna perform
Pharrell wears a weird hat .. .and Arby's calls him out on it: