Here are two contrasting duets to think about:
"The Proposal/The Night was Alive" from
Titanic "Brush Up Your Shakespeare" from
Kiss Me, Kate -now this song will definitely have 'em rolling in the aisles (especially if you can work in the encores!)
"You pile up enough tomorrows, and you'll find you are left with nothing but a lot of empty yesterdays. I don't know about you, but I'd like to make today worth remembering." --Harold Hill from The Music Man