Rihanna insists shes single and happy

London - R&B; singer Rihanna has shot down rumours that shes dating actor Ashton Kutcher, who recently separated from wife Demi Moore. When the 24-year-old singer was pictured leaving Kutcher's house at 4am last week, she sparked rumours of a romance with the Two And A Half Men star, reported the Daily Mail. But when Rihanna was asked about the status of her relationship, she said: "I'm happy and I'm single, if that's what you're really asking. According to sources, Moore is said to be devastated after Rihanna was spotted visiting Kutcher's home.