Source: Bang Showbiz NewsRihanna has taken Oprah Winfrey on a tour of Barbados.The 'We Found Love' singer gave the popular talk show host a private tour of her native island when she visited her for a special in-depth interview for an upcoming episode of 'Oprah's Next Chapter'.The 24-year-old singer teased fans on twitter by posting a picture of the pair in her car along with the caption: "Look who popped up in my hometown Barbados...Top notch."Oprah admitted to being pleasantly surprised by the "refreshing" superstar and announced that the special episode of 'Oprah's Next Chapter' will air in America later this month.The TV presenter tweeted: "What a refreshing surprise she is!... Rihanna interview is August 19th. Didn't want to compete with Olympics! But worth the wait. She brought it!"Oprah 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 Oprah's show, despite the bubbly host dedicating an entire episode to domestic violence after the Chris Brown incident.