Chace Crawford and Carrie Underwood seemed headed for the top of the hot new celebrity couple heap, but reports say the Gossip Girl actor was seen getting too cozy with co-star Leighton Meester. Good luck, Chace -- we've all seen what happens when Carrie is wronged by a cheating boyfriend (watch your car, bubba!)

Since we had to scratch them off the list last minute, see who snagged their spot on our hot Hollywood couples list!

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