Credit: FameFlynet

Back on? Katy Perry and John Mayer reunited in Los Angeles on Wednesday, December 30. The on-again, off-again couple hit up West Hollywood hot spot The Nice Guy.

Mayer, clad in a black coat, and Perry, in one of her holiday onesies, were seen exiting the venue around 4 a.m.

The duo have been on and off since first stepping out together in the summer of 2012, after Perry’s divorce from Russell Brand.

Following their February 2014 split, Mayer, 38, and Perry, 31, have been spotted having dinner in Beverly Hills, attending Allison Williams’ September nuptials together, and most recently, having a blast at Disneyland this past May. 

According to an eyewitness, the two seemed like they were back on during their magical date at the happiest place on earth, where they were seen “walking around the park holding hands” and looking romantic. At the time, another source told Us that Mayer had intended on getting Perry back.

"He worked his way back into her good graces," the insider told Us. "He's trying not to mess it up."

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