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Before he was the resident stud on Gossip Girl, Chace Crawford was an 18-year-old college freshman at Pepperdine University, and it was then that he reportedly had a hot and heavy relationship with none other than Shauna Sand!

Shauna tells Star Magazine that she met Chace at a college party in Malibu (don't even ask why she was there!), and after the two began dating, she even gave him a key to her apartment! Shauna tells the mag, "He was so incredibly beautiful - I immediately fell in love with him!"

And get this - a source tells Star that Shauna took his V card! The source said, "Chace told me, 'Shauna was the first girl I ever had sex with! She blew my mind, and I'll never forget it!'"

Really Chace?