As followers of this site know, I really like a cappella singing combos and one of the best I've found is Voctave, an aggregate of great singers whose membership seems to change a bit with every video. Here's whoever was in the group when they made this one performing a song from Meredith Willson's The Music Man. Don't write me thinking you've found a spelling mistake, Brent. He spelled it with two "L's."