Fan shocks Rihanna with his incredible voice at 'Anti' concert

Rihanna is usually the one pulling out all the stops to shock her fans, but the tables were turned over the weekend when one audience member in Cincinnati, Ohio left her dumbfounded in front of thousands.

The unforgettable moment occurred when RiRi took the stage to perform her ballad, "Four Five Seconds," before deciding to ask the crowd for a little help with the lyrics. It appears as though she sniffed out the best candidate for the job, as she leaned over to a young man in the audience who was more than willing to take on the challenge.

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The moment he begins to sing and Rihanna becomes aware of his voice, she fails to keep her cool as her jaw drops and her eyes widen with shock.

After the exchange the fan, TJ, screams with excitement as she reached down, grabs his hand before wrapping up the song, saying, "Thanks for helping me out babe."

TJ has gained tons of praise for his powerful vocals and ability to perform on-the-spot with the best of them. He took to Instagram to thank everyone for their support, and explain what the experience meant for him overall.

Check out his reaction to the once in a lifetime experience below.