Talk about going from one extreme to the other. George Clooney's ex-girlfriend Elisabetta Canalis was seen sucking face with Steve-O of "Jackass" fame, Just Jared reports.

Canalis, 33, and Steve-0, 37, both competed on "Dancing With the Stars," but not during the same season, so that doesn't really explain it. Apparently, Steve-O "makes Elisabetta laugh, and that’s her weakness. That was her favorite thing about George Clooney -- he was always cracking her up and playing practical jokes on her," a source told Radar Online.

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But Canalis isn't the only celeb who has nursed her wounds with a questionable rebound relationship. Jennifer Lopez, 42, kicked off a "fun fling" with 24-year-old backup dancer Casper Smart just months after splitting with hubby Marc Anthony. In late 2010, David Arquette told Howard Stern he had sex with cocktail waitress/bondage film star/serial celebrity dater Jasmine Waltz, just one day after announcing his separation from Courteney Cox. And Jesse James said he'd do anything to win Sandra Bullock back, but two months after their divorce, he began dating tattoo artist Kat Von D.

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From Canalis to Casper to Kat Von D, let us know: Which celeb had the lamest rebound?