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