Kim Kardashian’s Daughter North West Joins Katy Perry On Stage At Her Las Vegas Show

North West is a true California girl! Kim Kardashian took her 9-year-old daughter and her friends to Katy Perry’s “Play” residency concert in Las Vegas on Saturday night – and she shared all the fun on her Instagram Story for fans to see. During the concert, Katy invited North and her pals on stage to participate in a walk off competition.