Well, holy cow. If you haven't seen this already, it is worth your time. And you might need the Kleenex box for the happy tears. I sure did.
Kristin Chenoweth was performing at the Hollywood Bowl and chose an audience member (as she typically does) to come on stage and sing with her. Usually these things are funny and sometimes cringe-worthy. It's totally unrehearsed.
Well, on this night, she picked Sarah Horn, a voice teacher. You can read Sarah's account in her own words here. Also, here's the recap via Huffington Post.
Here's the video. If you want to see a little better close up and enjoy the looks on both their faces, here's a link to another one from a different source.