"I Thought My Life Would Be a Mardi Gras" is a song by Marge during the production of Oh, Streetcar! in the episode "A Streetcar Named Marge".
What's the matter, honey, are you lost?
I'm lookin' for ma sister, Stella.
Ma name is Blanche DuBois.
I thought my life would be a Mardi Gras,
A neverending party...
I'm a faded southern dame
Without a dime.