The Canadian singer surprises passengers with a Jackson 5 song as he performs on a New York platform to promote his album.

Michael Buble has surprised New York commuters with an a capella performance on the subway.

The singer sang a rendition of the Jackson 5 classic Who’s Lovin’ You on the platform at the 66th Street Lincoln Centre station.

He was joined by the group Naturally 7 on backing vocals as a small crowd looked on, many filming the event on their smartphones.

Buble hugged the group after the performance and said it was “the coolest thing ever”.

“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,” said the 37-year-old Canadian.

His new album, To Be Loved, came out on April 15 and he is now on a promotional tour for the record.

“Out of all the press I had to do, out of everything that I’m gonna do –  Europe and America – this was the thing I was most excited about,” said Buble.

The singer’s clean-cut image and traditional big band songs have seen him sell millions of albums around the world and pick up several Grammy awards.

Buble also has a big following in the UK and is playing 10 dates at London’s O2 Arena this summer.

The crooner is not the only singer to take their musical talents onto public transport.

Kim Wilde scored nearly two million YouTube clicks at Christmas for an impromptu performance on a London Underground train.