It's symbolic for what we need to do, as a people and as a community, is to not try to out-sing the person next to you, but blend with them and harmonize with them. ♪ that star spangled >> reporter: that man who was walking by, emanuel henreid, is a trained opera singer. and tonight, he says he is grateful she was up for that duet. >> it was a beautiful moment that we shared and in that moment, i realized that it's essential for us to raise our voices in empowerment and in love with one another. ♪ and the home of the brave >> the unexpected duet for graduation and we loved it and what it s...