CLAUDE: And you, my dear? [how much French do you speak?]
LORELAI: Even less. Uh, voulez vous couchez avec moi ce soir? That’s about it …
CLAUDE: It’s a pop song, ah, Monique . . . I did not know that.
MONIQUE: “Lady Marmalade”.
“Lady Marmalade”, a 1974 pop song written by Bob Crewe and Kenny Nolan, performed by R&B group Labelle, it went to #1 in the US and Canada. The song has been covered several times, including the 2001 version from the Moulin Rouge! soundtrack by Christina Aguilera, Mya, Pink, and Li’l Kim, which also went to #1.
The song is famous for the repeated refrain of Voulez-vous coucher avec moi?, which translates to: “Do you want to sleep with me?”.
Monique gets Lorelai’s joke and is familiar with the song – the 2001 version went to #12 in France, although earlier cover versions had charted there as well, if not so high.
The Annotated Gilmore Girls 