CRAYON POP, July 22, 2015 : Ellin, Gum-Mi, Cho-A, Korean girl group Crayon Pop perform during the promotional event for their new single "ra ri ru re" They performed the opening act for Lady Gaga's "ArtRave: The Artpop Ball concert tour" in twelve cities across Japan. They performed the opening act for Lady Gaga's "ArtRave: The Artpop Ball concert tour" in twelve cities across North America on 2014.