There’s a little bit of salty language in this, but the moment is unmistakably cool.

The setup: Buble’s doing a concert in England somewhere, and he’s doing a little audience interaction. A woman comes up and says she’s got a son who just turned 15 and he’s at the concert, and she’d love it if Buble would let him sing.

And he says “Oh, why not?” He figures this is gonna stink, but what the heck – it’s a nice thing to do for the lady who’s a big fan.

But it gets good from there…