NPR's Ari Shapiro gets his groove on with Pink Martini

At this year's Baltimore Symphony Orchestra Gala, the headliner will be Pink Martini, a self-proclaimed "little orchestra" from Portland, Ore., that's been together for nearly two decades. Pink Martini has about a dozen musicians in its regular roster and plenty of recurring guest stars, including NPR White House correspondent Ari Shapiro (soon to be London correspondent, but more on that later), who will be joining the group at the BSO shindig to sing "But Now I'm Back." Nifty, right? Moonlight...