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It happened on a street in Montreal on Monday.

A street performer singing “Stand By Me” was already enough to get the crowd going, but then something amazing happened.

Award-winning singer Seal, joined in for a soulful duet.

The video shows Seal leaning against a tree, adding subtle backup to the man’s already stellar show.

The guitar-playing busker totally went with it — at first.

As the collaboration ended, the unknown guitarist appeared to melt — fighting back tears.

Check out the heartwarming video recorded by casual audience members who captured the impromptu live performance.

Kamron Taylor |