When it comes to celebrity engagements [2], there are rings, and then there are rings. From diamond-studded bands to diamonds surrounding even bigger diamonds, these rocks are no joke. Whether it's one of J Lo's engagement rings [3] or the Duchess of Cambridge's iconic stone, see if you can point out the brightest and most beautiful rings [4] that celebs have flaunted over the years. These rocks are downright unforgettable, so test your knowledge now. Good luck!