ET's Cameron Mathison was at the premiere of Office Christmas Party in Hollywood on Wednesday, along with two of John Mayer's famous exes. Katy Perry and Jennifer Aniston happily greeted one another on the red carpet with a hug and even posed together.
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Both ladies were dressed to the nines, with Aniston, 47, wearing a low-cut patterned Roberto Cavali dress that she paired with Brian Atwood sandals, Fred Leighton jewelry and a Tom Ford clutch. As for Perry, 32, she opted for a sleeveless black gown with a slit up to the thigh that she accessorized with a large pearl choker and dotted black tights.