Jersey Boys.
West Side Story as well, and it's not because I don't like the show. I think it's great, but I don't understand why it is so popular while other classics aren't. WSS sells out all over the world, and other fabulous classics get a luke warm response. I don't think WSS is that much better than, say, Gypsy or Guys and Dolls.
"If this is going to be a Christian nation that doesn't help the poor, either we have to pretend that Jesus was just as selfish as we are, or we've got to acknowledge that He commanded us to love the poor and serve the needy without condition and then admit that we just don't want to do it." -Stephen Colbert