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Rihanna So Did Not Expect Her Fan To Out-Sing Her

Ya got some competition, Riri.

Rihanna was left shocked after a fan upstaged her with his incredible vocal performance at a concert in Cincinnati, Ohio.

The “Work” singer was performing her song “FourFiveSeconds” at the city's U.S. Bank Arena on Saturday when she offered the microphone to Terah Jeh, a fan in the front row of the audience.

Terah, who according to TMZ.com has performed in choirs as an amateur singer, then belted out the next line of the track so perfectly that the Barbadian star was seen looking on in shock.

Damnnn. He's gooood. 

According to Terah, the star is even looking to keep in contact with him by following him on Twitter after his stunning performance, writing, "Y'all don't understand how long I have been riding for @rihanna, I will never forget this. She followed me too."

The video of the fan was widely shared on social media, and with Teraj writing that the attention had given him "a whirlwind 24 hours" since he was able to sing alongside his idol.

Professing his affection for Riri he added, "Seriously @rihanna, I love you. Endlessly."

The U.S. leg of Rihanna's ANTI world tour, which has seen a number of dates rescheduled due to production difficulties, continues on Tuesday with a date in Washington D.C.