Profile for Jacobus

(I posted this in the student board, trying to get broad answers here).

I was given an assignment/performance - to do a two part, male duet with my friend, that incorporated significant harmony. Now, my first thoughts were things like "We can do it" and "Where did we go right" from the producers, or songs such as that, but apparently they're not harmonious enough. My friend and I would attempt a more operatic piece, but alas he is a bass and me a baritone at best. SO, does anyone know o