Summer's Dirty Dozen

Mel Gibson. Lindsay Lohan. Taylor Momsen. See the 12 stars who were very, very naughty this summer

SPENCER PRATT

When the former Hills star – dressed as a cross between Einstein and Kenny Rogers – crashed the show's finale, it seemed like things couldn't get more bizarre. But as Heidi Montag readied her divorce, Pratt had a moment of, well, clarity: "There's no way my love for fame and her love for puppies will ever work out successfully," he told PEOPLE. Only in Hollywood, kids.