The 'We Found Love' singer gave Winfrey a private tour of her native island when she visited her for a special in-depth interview, reported Aceshowbiz.
The 24-year-old posted a picture on Twitter of the pair in her car along with the caption, "Look who popped up in my hometown Barbados... Top notch."
Winfrey was pleasantly surprised by the "refreshing" superstar and announced that the special episode of 'Oprah's Next Chapter' will air in America later this month.
"What a refreshing surprise she is! Rihanna interview is August 19. Didn't want to compete with Olympics! But worth the wait. She brought it," Winfrey posted on her Twitter page.
The TV personality was invited to film inside Rihanna's house as part of the revealing interview in which the star is rumoured to open up about her relationship with ex-boyfriend Chris Brown, with whom she split in 2009 after he assaulted her.
The interview will mark the first time Rihanna has spoken on Winfrey's show, despite the bubbly host dedicating an entire episode to domestic violence after the Chris Brown incident.