All credit goes to our main man Joe at Busted Coverage for discovering this booty cam video by MJ Day, the editor of the Sports Illustrated Swimsuit issue. If we were betting men -- and we are -- we'd through $100 down that this is Kate Upton's butt we're looking at. Who's booty is your money on?
Eh... On second thought.... WHO CARES. JUST ENJOY THIS HOT PIECE OF... ART FOR WHAT IT IS.... YEAH, ART: