See Rihanna's Priceless 'Stunned' Face when a Fan Can Sing

By Hayden Wright

Rihanna's ANTI World Tour has already featured special guests like Drake, but in Cincinnati, the pop superstar's best backup came from a member of her audience. Fans captured the moment when Rihanna extends the microphone during FourFiveSeconds and is surprised—nay, stunned—at the vocal chops one guy brings to the table.

Related: Rihanna Just Surpassed Michael Jackson: Here’s Why It Matters

Cincinnati.com identifies the singer as Terah Stewart, an administrator at Ohio State University. His surprising contribution to her show made for a night he'll always remember.

"Y'all don't understand how long I have been riding for @rihanna," he later tweeted. "I will never forget this. She followed me too. #NavyForF---ingLife !!!!!!!"

Watch the funny, awesome moment here: