Mariah Carey revisited her marriage to former Sony CEO Tommy Mottola during her September cover story for Harper's Bazaar UK.

From Gwen Stefani's $500,000 sparkler to Mariah Carey's 35-carat emerald-cut diamond, here are the most expensive celebrity engagement rings ever.

Mariah Carey and ex-fiance James Packer may have split, but the singer clearly isn't ready to part ways with her 35-carat engagement ring.Carey was spotted wearing the $10 million rock on her left ...