Hot Heidi: Heidi Klum showed just what she's up to this holiday season by sharing a sexy photo of herself sunbathing topless on the beach on Twitter Tuesday. (Also: major sideboob alert!)
As the 39-year-old "Project Runway" host likes to say on her hit Lifetime show, either you're in or you're out. In this case, we're in. In serious envy.
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