All women love diamonds, as I say carat is king! So which lucky girl has the most expensive engagement ring of all time?

It happens to be Mariah Carey’s engagement ring from Nick Cannon who spent a cool $2.5 million. Nick designed the ring with Jacob & Co to create this huge beauty that is 17 carat. This bling ring is a square emerald cut with a pink centre diamond surrounded by 58 amazing pink diamonds and two half-moon diamonds surrounding it.