I would say, since you sing "Ah Sweet Mystery Of Life" in the show, learn an old operetta song.
Something from "Rose Marie" or one of Gaylord Ravenal's songs from "Show Boat"
"A coherent existance after so many years of muddle" - Desiree' Armfelt, A Little Night Music
"Life keeps happening everyday, Say Yes" - 70, Girls, 70
"Life is what you do while you're waiting to die" - Zorba