thumb|300px|The song from the movie.

Indefatigable is a song performed by Sex Bob-omb in the movie.

After Knives Chau stalks Scott Pilgrim and Ramona Flowers through Scott's house window and thinks that Ramona stole Scott, Knives ran back to her house. Meanwhile, Sex Bob-omb is heard playing the song at Lee's Palace. While the song is playing, Knives comes up with a plan to steal Scott back from Ramona (she scam texts Young Neil: YUNG NEIL ITZ KNIVES. OMFG UR SO HOTT) After the text, the song ends and The Clash at Demonhead play their song, Black Sheep.

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