The Simpsons has a lotof theatre references, including a parody of My Fair Lady with Groundskeeper Willie as the Eliza character. He sang the song "Oh, Wouldn't It be Adequate".
They also had an On the Town parody:
(Sung to the tune of New York, New York)
BART AND MILHOUSE
Springfield, Springfield, it's a helluva town!
The school yard's up and the shopping mall's down.
The stray doys go to the anaima pound.
Springfield, Springfield!
SAILOR
New York, New York!
BART (spoken)
Hey, New Yrk is thataway man!
SAILOR (spoken)
Thanks kid!
BART AND MILHOUSE (sung)
Its a helluava town!!!!!
I am a firm believer in serendipity- all the random pieces coming together in one wonderful moment, when suddenly you see what their purpose was all along.