Even thought nude photos of Kate Upton have surfaced online in the past, it's always an event when the world's hottest model chooses to show off her bits and pieces.
Naked Kate is like the Super Bowl or Christmas. Sure, it's happened before that doesn't make it any less special.
So without further ado we present you - Kate Upton's Butt In a Sort-Of See-Through Skirt:
Yes, from this looks of this photo, Kate got all dressed up for some sort of classy soiree and forgot to put on...