New rule: If you're famous, don't twitter

Paris Hilton was just outed…by herself! When she was detained by police for carrying cocaine in her purse, Paris claimed it wasn’t hers.

But a Twitpic posted by the heiress herself has exposed her for a liar. She tweeted a photo of the gorgeous Chanel purse on July 15, and it’s the exact one she was carrying the night of the arrest. "Love My New Chanel Purse I Got Today :)" she tweeted that day.

This pretty much screws her defense, since she told the cops that the purse wasn’t hers and claimed that she’d borrowed it from a friend because it matched her outfit.

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