Christian Bale's recent admission that he once dated Drew Barrymore made it clear: when it comes to dating, Hollywood can feel as convoluted -- and incestuous -- as "Gossip Girl." And while today's romances are splashed all over the tabloids, what about the flings and hook-ups of years past? Here, we look back at 21 bizarre celebrity romances, from Robert Downey Jr. and Sarah Jessica Parker (RDJSJP?) to Sandra Bullock and Ryan Gosling -- plus the one woman who got George Clooney to say "I do."
SLIDESHOW: 21 "They Dated?" Celebrity Couples