Katy Perry surprised those attending the L.A. premiere of her tour documentary, Katy Perry: Part of Me, with a free concert outside Grauman's Chinese Theatre last night. OK! NEWS: KATY PERRY ON 'ELLEN': "WE'RE NOT PERFECT," "MY ROAD'S BEEN BUMPY" The singer wore a bustier fashioned to look like two reels of film and a popcorn box trimmed skirt — normal Katy Perry attire. Later, she changed into a red velvet, old Hollywood style dress with glam, ... Read More >>