Rio is joined by Queen of the Vlogosphere, Olivia Grace, who’s bringing all her biggest tracks to The Playlist! Olivia Grace flexes her vocal skills against Rio in Race Against the Mic and things get musical when they play Crack-A-Track! Then we head to The Playlist Newsroom, where we meet one of pop’s next big stars, Hannah Grace, and Dev fills us in on all the latest pop gossip! Show less