My Little Pony: Friendship Is Magic Season 4 Episode 14 Filli Vanilli Episode Title:Filli Vanilli.Episode Description:Big McIntosh loses his voice the day before he is to sing bass with the Pony Tones vocal quartet for a benefit concert. Despite her crippling stage fright, Fluttershy agrees to sing his part backstage while Big McIntosh lip-syncs, taking a Poison Joke brew made by Zecora to recreate her masculine "Flutterguy" voice. The concert goes on perfectly, and Fluttershy insists she continue singing for Big McIntosh out of sight as she enjoys being able to sing. After Big McIntosh recovers his voice, Fluttershy asks to perform one last time, but accidentally reveals herself during the concert. She runs off in embarrassment, but her friends convince her that facing her worst fear was not as bad as she had imagined because the audience loved her performance. Fluttershy agrees to perform privately for her friends with the Pony Tones, and agrees to permanently join the band once she fully overcomes her stage fright.