sing in front of an audience

I’m in a play in a small community theater where I have to sing a particular song a capella. Fortunately I have acted there before and I can carry a tune. The song is old so not many people know it, so they don’t have a preconceived idea of how it should sound.

I sang it last night in the theater at rehearsal, and felt the ecstasy of filling my voice with the room. I hope it’s good in front of an actual audience, including my fiance!