Rihanna holds mic out for singing fan at gig, has her mind blown

It's fair to say that 28-year-old Terah Stewart seized his moment

Rihanna got quite the surprise during one of her gigs after inviting an audience member to sing.

The Barbadian singer was performing a rendition of her Kanye West-Paul McCartney collaboration "FourFiveSeconds" when she crouched down by the edge of the stage, holding out the mic for the audience.

It was 28-year-old Terah Stewart who sang back to Rihanna - and it turns out he has a rather impressive voice.

Following the gig at US Bank Arena in Ohio, Stewart naturally posted on Twitter about the moment he shared with his idol who has since followed him back on the social media site.

Last month, Rihanna released her eighth record Anti through TIDAL days after dropping her single "Work" which features Drake. The album was downloaded a million times in 15 hours.

The artist will play a series of UK shows, including a date at London's Wembley Stadium, from 14 June.