There's a new video montage online of celebrities doing embarrassing commercials before they were famous.  Some of them are pretty well-known, like MATT LEBLANC'S 1987 Heinz ketchup ad.
But there are probably a few you've never seen, like BRAD PITT'S Pringles ad, BEN AFFLECK'S Burger King ad, and COURTENEY COX'S Tampax ad.