Canadian singer Michael Buble once challenged his drummer's friends to a fight when he mistakenly thought they had been heckling his performance.
The Call Me Irresponsible star thought the group had been booing him.
He tells U.S. magazine Blender, "One time I was singing at a club, and these guys kept booing me and at the end of the night I asked them to step outside.
"But they weren't yelling, 'Boo! Boo!', they were yelling 'Lou! Lou!' because my drummer Lou Huger was a buddy of theirs.
"I felt like a jackass."