Michael Buble Surprises NYC Commuters With Subway Serenade

Michael Bublé is making the rounds in New York City this week, promoting his new album "To Be Loved."

But in addition to standard TV appearances, he surprised Subway riders Thursday when he performed an impromptu acappella rendition of his latest single, "Who's Lovin' You."

Dressed sharply in a suit and tie, Buble sang with the group Naturally 7 at the W. 66th Street subway stop. Watch below: