Rip is singing Ella Fitzgerald’s “April in Paris”.
Rip (singing): April in Paris, this is a feeling / That no one can ever reprise / I never knew the charm of spring / I never met it face to face / I never knew my heart could sing / I never missed a warm embrace / Till April in Paris!
Lupin: Yes…it’s a lovely city, isn’t it? Much too nice to let your kind ruin.
Rip: You!! I don’t know how you got here…but I think I’ll shoot first and ask you about it later.