Rihanna got the rumor mill going when she was spotted wearing a large diamond ring over the holidays, the Daily News reports. But boyfriend Chris Brown's rep says the two aren't engaged. The couple have dated since 2007, but Rihanna is tight-lipped on their relationship: “People always want to know what it is and what it isn't. People think they know. They try to guess,” she said on The Ed Lover Show last year.
(Read more Rihanna stories.)