Best on-stage kiss

Katy Perry spent most of the night in her seat, flirting with gal pal Rihanna and John Mayer (yep, he was her plus one), although she did get up to present the award for Best Pop Video. It went to One Direction and as Niall Horan went to collect the Moonman, he also scored a smooch from Kitty Purry, who's feline form is now being upgraded to cougar.