Whose sheer slip up?Whose sheer slip up?Well nip, nip, hooray.

Someone is celebrating with two little friends.

This inhabitant of Celebville is letting it all hang out in LA.

Running around, roaming free.

Or was this just a slip-up?

A mere oversight of the bra variety, perhaps?

Go see who's white-boobed but red-faced in our gallery of stars' see-through slip-ups.