If you're like most people, you probably don't give a second look when you encounter a street musician. Perhaps you drop a buck or two in their hat or guitar case, at most. But trust us, you'd stop to watch these guys.
Watch as one guy is sitting out front of a store jamming on his acoustic guitar. He sounds pretty damn good on his own, but sounds even better when another passer-by stops to lend his vocals to the effort. That's already impressive, but then, along comes a third guy to add to the performance!