It happens on a regular basis. Celebrities will be on the red carpet talking about how they've been working out constantly and eating almost nothing leading up to an award show.  Then you can see them drift off into their mind where (I imagine) they're picturing themselves stuffing their faces with a burger from a fast food restaurant right after the show.

Who chowed down on a Big Mac after the AMAs on Sunday?

It was Heidi Klum.  She hasn't taken a bite yet- but I don't know a soul alive who could resist eating one of those burgers once they're already holding it and just pose for a photo op.  Here she is on last weekend's red carpet...