Michael Bublé Stuns Subway Riders With Surprise Performance

Singer Michael Bublé recently shocked New Yorkers at the 66 Street-Lincoln Center subway stop with an a cappella performance of Jackson 5's "Who's Lovin' You."

"That is the coolest thing ever," he said after performing the song with R&B a cappella group Naturally 7. "Singing in the New York subway is when you know you made it. ... You see some of the greatest musicians come down here and play."

Subway riders waiting for or exiting trains stopped to watch the Grammy-winning artist work his vocals. They whipped out their smartphones to capture the action

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