Nick Cannon guest stars, in a Make It Pop! Season Finale, as XO-IQ tries desperately to take the stage one last time. This is it - they need to perform for the "MacKendrick Tonight" TV crew, and for Julie Greensteel, the musical star-maker who could launch their careers. Problem is, Principal Diona has forbidden them from performing. Now as romantic tensions mount, can the band pull it together in time to impress Nick Cannon, Julie, and their national TV audience? Meanwhile, there's an offer on the table that could change their lives...