Music See Katy Perry Sing With P.O.D. on 'Tonight Show' Before She Was Famous Nu-metal band and future pop star crossed paths on "Goodbye for Now"
Music See Deftones Cover Katy Perry's "Firework" in the Middle of "7 Words" in 2011 A surprising quote at Lollapalooza
Music Hear Katy Perry's "Dark Horse" Covered in Style of Type O Negative Pop song gets goth-metal makeover courtesy of YouTube star Anthony Vincent