Life king's singing voice: Little do you know by Alex and Sierra (Alex is his singing voice!)
Sun's singing voice: I kissed a girl by Angele
Moon's singing voice: Cannibal by Kesha
Death king's singing voice: Queen of mean male version by Nightcore
Anne's singing voice: If the world was ending by Julia Michaels
Grey's singing voice: Believer by Imagine dragons
Jess's singing voice: Moral of the story by Ashe
Dylan's singing voice: Stuck with you by Emma Heesters
Becca's singing voice: Tomboy by Destiny Rogers
Travis's singing voice: IDFC by Blackbear
Sanji's singing voice: Shy by Jai Waetford
Goro's singing voice: Twisted by MISSIO