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!
Ouch! Kelly Osbourne is usually a stunner on the red carpet, but the Fashion Police co-host was glowing for a different reason in this painful snapshot that she posted to Twitter, with the hashtag "I'm Smart!"