Katy Perry, John Mayer, Rihanna and More at 2013 Grammys After-Party (Photos)

Katy Perry, John Mayer, Rihanna, Pete Wentz, and a slew of other musicians let loose at the 2013 Grammy Awards parties after Sunday’s show.

A number of celebrities who weren’t at the awards show, such as Ashley Benson and Jessica Lowndes, also came out to celebrate at Warner Music Group’s bash and Island Def Jam’s massive blowout.

RELATED – Grammy Awards 2013 Red Carpet Pics

Check out the PHOTOS below!

Whose after-party look do you like best?

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