Guest Stars Anders Holm as JJ Riki Lindhome as Justine the Belieber Jack McBrayer as Luther McMonster Joe Lo Truglio as Clark the Mo-Cap Maestro Rachel Bloom as Samantha Swiftie Nicole Byer as Beatrice of the Beyhive Co Starring Alice Dinnean as Supporting Muppet Performer Bradley Freeman Jr. as Supporting Muppet Performer Donna Kimball as Supporting Muppet Performer Sarah Oh as Supporting Muppet Performer David Bizzaro as Supporting Muppet Performer Stephanie D'Abruzzo as Supporting Muppet Performer Jon Bailey voices Voice of God