Don’t Tell Me I’m Pretty - Faouzia CITIZENS tour (Montreal) 

I think that might be the *only* time I think I've ever heard her go off-key, and it seemed to be a muscle twitch. It happens sometimes.

It was the fan that was recording the show. She tried to sing along with Faozia. You can still hear Faozia's voice on the backwards singing before and after that, but the fan's voice really overlapped Faozia's for a few seconds.