Special Guest Stars Will Forte voices Old Scott Guest Stars Lily Lammers voices Additional Voices Jackie Lastra voices Additional Voices Deneen Melody voices Additional Voices Alan Lee voices Additional Voices Dorah Fine voices Additional Voices Caleb Yen voices Additional Voices Stefan Johnson voices Announcer Phillip Reich voices Additional Voices Abdiel Gonzalez voices Singer Jamal M. Moore voices Singer JJ Lopez voices Singer Dylan Gentile voices Singer Sara Mann voices Singer Anna Schubert voices Singer Suzanne Waters voices Singer Gerald White voices Singer Julian Cihi voices Katayanagi Twins James Harper voices Singer Jessica Rotter voices Singer Lindsay Abdou voices Singer Angie Sarkisyan voices Demon Girl #4 Angie Sarkisyan voices Demon Girl #2 Elyse Wills voices Singer Chris Hackney voices Additional Voices Courtney Lin voices Demon Girl #3 Courtney Lin voices Demon Girl #1