Regular Show - Season 2

Rigby has an annoying song stuck in his head, much to the chagrin of him and Mordecai. Mordecai helps Rigby as they try to get the song out of his head, but find it very difficult. Eventually, Rigby takes a nap and manages to remove the song from his head, however, the song comes to life in the form of a humanoid cassette tape with eyeglass shades, and annoys everyone.