Kelly Rowland is the latest celeb to announce the exciting news of her engagement to her boyfriend and manger Tim Witherspoon! It defiantly looks like Tim proposed with a huge diamond engagement ring after the singer accidently showed the world her ring on instagram. This picture is the only one showing Kelly’s ring, so we’re not exactly sure on the ring style and the size of the diamond – but from the pictures it looks like a big one. The couple have been dating for the last four years and apparently he popped the question. The ring was seen on an Instagram video where Kelly was wishing her friends kid happy birthday. The couple have kept their relationship very low key to avoid tarnishing Kelly’s career as a sexy solo singer. We’ll keep you posted with the ring details – sure it’s a corker.