A list of real songs about fictional songs (e.g. "Jailhouse Rock")

On Making Light, Avram Grumer is compiling a list of real songs about fictional songs, like "The Time Warp," "Jailhouse Rock," "The Monster Mash," "Crocodile Rock," "Waltzing Matilda," "The Tennessee Waltz," and "The Masochism Tango" (not to be confused with songs that are about themselves, like "Let's Do The Twist"). Can you think of more?