Il Divo? Cats? NYSNC? Sister Hazel? Sir Paul? Bonnaroo? Medeski, Martin, and Wood? Big Gigantic? Vanilla Ice? MC Hammer? U2? The Raconteurs? The Elders? Brian Setzer? The Rolling Stones? Drunk Chrissie Hynde? What's the best concert you've ever seen? Would your answer change if we opened up the question to include all live stage performances? [...]