Katy Perry Tweets John Mayer 'Santa Baby' PHOTO

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Katy Perry was spreading Christmas cheer last night when she shared an interesting photo with her 30 million Twitter followers.

The sexy Santa poser was none other than her musician boyfriend John Mayer, who donned a red suit and hat during a family gathering of Katy's relatives.

Perry, 28, and Mayer, 35, had been on-again off-again for the past six months.

Katy split with husband Russell Brand a few days before Christmas 2011.  Their divorce was finalized in July 2012, ending the 14-month union that began with a traditional Hindu ceremony near a tiger sanctuary in India.

Photo:  Twitter-Katy Perry