Not To Butt In...

Tori Spelling and Dean McDermott were spotted kissing each other goodbye on the Heroes set in Venice yesterday, which is sweet and all, but what we really want to know is...what's going on with Tori's rear end?

One butt cheek looks perky like Nicole Richie's (well, kinda), and the other looks like one of Tara Reid's! It's almost like her butt matches her misshapen boobs, and we're totally confused...she's gotten super skinny, and now this!

What do YOU think is going on here?