This street busker was strumming a 1980s pop classic on his guitar on a street in Berlin when the lead singer from the band walked up and sang along.
But while the busker's reaction appears genuine, the person who filmed the incident possibly played a role in setting it all up.
Footage uploaded two weeks ago shows the musician leaning against a wall as he performed an acoustic version of the British synthpop group Bronski Beat's 1984 hit Smalltown Boy, which reached the top 10 in Australia at the time.
A middle-aged man walking his dog, who is in fact frontman Jimmy Somerville, then pops into frame and starts singing the falsetto chorus.
The one-minute clip has attracted more than 300,000 views since it was posted on YouTube last month.
The uploader wrote: "What a huge surprise for this street musician and us.
"Awesome, things like that only happen in Berlin."
But the footage, recorded on a mobile phone, was uploaded by a member of a late night show in Germany called Onkel Bernis Welt, which has cast doubt on whether the footage is as spontaneous as it presents itself to be.