This Former '90s Sitcom Heartthrob and Reality Star Is Hugging a Naked Lady, But Who Is He? (PHOTOS)

It's newly-minted X Factor host Mario Lopez and his fiancee Courtney Mazza. With the racy Twitpic, Mario tweeted, "Getting a little sexy with @CLMazza on this shot...#Where'sHerTop?" Ha! We actually think the hair kind of gave it away, but did you guess correctly? 

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