It's always a risky moment when someone who can definitely sing, in this case Rihanna, thrusts the microphone to an audience member during a gig.

Nine times out of ten it's pretty cringe.

But at RiRi's show over the weekend quite the opposite happened, as one fan had the singer lost for words when she chose him to duet with her.

DAAAAYUM.

We thought it was going to be another Beyonce moment, because no one ever wants this to repeat itself:

Never going to live that down, poor girl.