Star Tracking: Katy Perry, Justin Bieber, Kylie Jenner & More From performing to shopping, these stars can do it all ByAriel Robinson Monday , 16 March 2015 Katy Perry performs live in concert during 'The Prismatic World Tour' at O2 World 0 Previous Next WENN.com Thumb-Previous Thumb-Next Share Your Photo On Tags : CELEB PHOTO CELEB PHOTOS STAR TRACKING