Get the show version of Matchmaker, Matchmaker from Fiddler. Yes, the trio.
Find three completely separate voices, deliveries and characters for Tzeitel, Hodel and Chava. Make sure we can tell them apart. Learn the song finding the melody line. Figure out which line you'll sing when. Rehearse it within an inch of its life.
Sing the whole song as a Trio-For-One. Don't camp it. Don't even acknowledge that you're doing what you're doing. Do it like this is the way it has always been done.
If this doesn't dazzle them, what will? Cartwheels? Baton twirling? Trained animals?
"If my life weren't funny, it would just be true. And that would be unacceptable."
--Carrie Fisher