April 4, 2012 8:42 am “Katy Perry: Part of Me” A documentary look at Katy Perry, from her days as a struggling singer to her rise to global stardom. US & World Videos 0:40 Watch: Police dog tracks and finds missing 85-year-old woman in Colorado 2:19 11-year-old celebrates teachers with appreciation snack cart 1:19 Met Gala 2024 after party looks: Cardi B, Lana Del Rey, EmRata 6:22 Craig Melvin compares ‘TODAY' crew to NASCAR 1:02 Judge indefinitely delays Trump's classified documents criminal trial