If there's one thing celebrities are known for more than mixing and mingling at awards shows, it's frolicking at the beach. But even Hollywood's brightest stars can make some pretty amateur mistakes -- see Rachel Bilson, Kim Kardashian, Kelly Osbourne and other bold-faced names with some seriously awkward tan lines and sunburns. Stars: They're just like Us!
Not suitable for work, Heidi! The leggy Project Runway host has never been shy, and she had no qualms showing off her sun-kissed derriere on Twitter after a Bahamas getaway.