Katy PerryKaty Perry gave her fans a little early XXX-mas treat by changing her Twitter profile picture to one where it appears she's wearing nothing but a Santa hat and Christmas lights. Ho ho ho! Let's just hope her boyfriend Russell Brand doesn't mind.

This isn't the first time the 'I Kissed A Girl' singer has posted skin baring photos on Twitter. She previously posted a photo of herself in the bathtub eating pizza... covering up just enough to make it SFW.