Well, they won their third championship last year. This is that performance, a 12-minute medley of two songs. The first is the definition of simplicity itself, not an ounce of showmanship, just absolutely impeccable, breathtakingly gorgeous singing. "No Other Love" (no, not the Rodgers & Hammerstein song). But then...well, then, that's when they blast into a number that in a million years you would probably never pick it for a barbershop singing. "Step in Time" from the movie, Mary Poppins. And they have just one bejeepers of a fun time with it, as the showmanship explodes.
Which won them championship.
(Again, as before, I recommend watching this full-screen.)