Duet

A really, really big duet.

Or is the correct term 'pas de deux' or something like that? No, not 'pas", that would be 'no.' 'Paix de Deux' might be the term I'm thinking of, tho it would have to be a colloquialism. Peace of two? I guess it beats 'danse macabre.' My Froggish is très faible.