Peggy and Rocki go to a mysterious island so that Peggy can accomplish her mission. Barbie, Barbie, and Ken are in hot pursuit, with Trey and Skipper not far behind.
Rocki tricks Skipper into auditioning for a reality TV show in order to steal Peggy. Barbie and Barbie are shrunk to tiny sizes and must escape Tiger to warn Skipper.
Barbie heads to New York for a Performing Arts summer program, where she meets another Barbie Roberts. Though the two quickly become friends, their bond is tested by the Spotlight Solo competition in Times Square.