Look Mommy I'm A Rockstar is a song written and performed by Senora Lonza on the episode called Enter the Dragons in Season Two. Another song was Shut Your Face Grandma.
Senora Lonza
Song
The song was based on a boy who grew up to be a rockstar just to show off to his mother. There is implication that Sal was this boy. Sal sang it while Joe used the drums. The audience booed and made strange faces.