Ave Maria

"Ellens dritter Gesang" ("Ellens Gesang III," D. 839, Op. 52, No. 6, 1825), in English: "Ellen's Third Song," is a song composed by Franz Schubert in 1825. It has been recorded by many artists, such as Barbara Bonney, under the title of Ave Maria.

History
After being expelled from Dipper's body, Bill Cipher is left week. Using one of Mabel's sock puppets, he crawls towards the twins. Seeing that Bill is on top of a pile of fireworks, Mabel uses the opportunity to set off the fireworks to defeat Bill. The fireworks go off, destroying the set and all of the puppets for Mabel's play. As the puppets burn and fall to the ground in slow motion, with Gabe Bensen looking on in horror, Bonney and Parsons' version of the song briefly plays in the background.