3. Harry Styles became BFFs with Rihanna:
5. Taylor Swift got close to Justin Timberlake:
(While Niall Horan and Ellie Goulding got close in the back.)
9. 2 Chainz and Grimes wore the same thing:
14. Kanye was there…and performed.
15. Kanye was there…and performed.
16. Lady Gaga left because she was pissed that people booed One Direction: