Katy Perry & John Mayer -- They've Become THAT COUPLE!!!

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Katy Perry & John Mayer
They've Become
THAT COUPLE!!! Katy Perry and John Mayer have gone from the on-again/off-again pair who seem to always be in limbo ... to the couple that posts super cheesy holiday photos online while wearing matching outfits.

Don't you just HATE those couples?

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