Auto-tune

Auto-tuning is an ability used by Finn after swallowing a little computer, it modulates his voice in a musical way. It was first used in "The Jiggler." Finn used it to sing the Baby Song to Stanley and the Jiggler. The second time it was used was in "Freak City", were Finn sung "The Hero Boy Named Finn" after going into depression about being in his foot body. Finn uses Auto-Tune again for the first time since season 1 in the season 3 episode "Another Way." The song is called Melons