Who doesn't love a chance encounter with a pop star?
His acoustic performance got the attention of a few onlookers - including the man who, it turns out, wrote and recorded the song, Bronski Beat frontman Jimmy Somerville.
Somerville, who was out walking his dog, joins the busker for the last bit of the song and turns the solo performance into a lovely duet.
"Is it you?" the musician asked in disbelief. "It's me!" Somerville replied.
Some believe this coincidental meeting was staged, but even if it was, we think it's still pretty wonderful.