Nick Cannon guest stars, as Sun Hi, Jodi, Corki, and Caleb prepare for their biggest show yet, called "MacKendrick Tonight." Stefan leads a TV crew, who will broadcast XO-IQ's concert out to the universe and launch them into worldwide fame!... If they can just find a place to perform. Meanwhile Sun Hi suspects Linc of withholding a secret from her; what's he hiding? Jodi hopes to uncover the meaning behind all the looks that passed between Heather and Caleb during the prom, hoping their relationship can survive... And just as the band prepares to take the stage, they're greeted by MacKendrick Tonight's celebrity host...