Cool idea, I'd love to see the final result *total s-cker for musicals*! What kind of songs are you looking for? Funny, serious, shamelessly romantic ones...? In duet form, or are you looking for songs for them to sing individually? I can't think of any good songs for them as separate characters, but as a couple, maybe "At the beginning with you" from the Anastacia movie would do? Or "If you were gay" from Avenue Q, which has a very humourous KuroFai feeling to it.