At the end when Jane and Russell are dancing to "Somewhere Over the Rainbow" the song is being sung by a man dressed as Liza Minelli, but was originally sung by Judy Garland. Liza Minelli is ironically the daughter of Judy Garland.
Goof: Ernesto refers to his pasta alla puttanesca as his "little whore", and says that that is what the name translates as. There is, however, no diminutive (indicator of smallness, such as the Italian suffixes -ino/-ina or -etto/-etta) in the name. It more literally translates as "pasta whore style", or loosely, "whore's pasta".