From Kate Middleton's royal sapphire to Kim Kardashian's massive rock, get all the details on the star's stunning sparklers
Three months after they began dating, Russell Brand presented the singer with a 5-carat pink-diamond Cartier ring in 2010, but she didn't like it! She swapped it for a 3-carat Cartier stunner worth $120,000. Sadly, the pair split in January 2012.
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