Michael Bublé performs on a New York City subway.

Canadian singer, Michael Buble is one the most popular singers in the world today.

Well feminine hearts were recently fluttering, as the vocalist sang in a New York City subway station.

At the 66th street location, Buble along with the group, Naturally 7, belted out the classic hit, “Who’s Lovin’ You”, originally performed by Jackson 5. Delighted Subway passengers captured the rare sight on cameras and phones.

Shocked fans respectfully kept their distance, but showcased ear-to-ear smiles and loudly applauded following the performance.

He states “Singing in the New York subway is something that's been done for years and years and years and I feel like it's the most authentic, organic way to make music. You see some of the greatest musicians in the world come down here and play.”

Late last year, 80s star, Kim Wilde showcased a pair of reindeer antlers and gave a musical performance on a train in London. “Rockin’ Around the Christmas Tree” was one tune she decided to sing.