Michael Bublé sings with a cappella group in NYC subway "I feel like a real New Yorker now," said the singer

Three-time Grammy Award winning Canadian singer-songwriter Michael Bublé made an appearance at New York City's W. 67th Street subway stop today for an "impromptu" a capella performance of "Who's Lovin' You," off his new album "To Be Loved." Surrounded by the singers of Naturally 7, Bublé surprised commuters, Bublé said, "That is when you know you've made it." He added, "Singing in the New York subway...is the most authentic, organic way to make music."