Mariah Carey

The partner: James Packer

The ring: 35-carat diamond

The proposal: January 2016

The marriage: Called off

Renowned for her five-octave vocal range Christmas queen Mariah Carey’s engagement to billionaire James Packer was as grandiose as her career. The centerpiece of their commitment was a staggering 35-carat diamond valued at a whopping $10 million. This jaw-dropping piece is one of the most extravagant in celebrity history, reflecting the luxury of both figures.

Despite the opulence of the proposal and the immense scale of their planned union, the couple eventually parted ways without proceeding to marriage. They broke up that same year close to Halloween, ending a nearly two-year relationship. Mariah later sold the jewel for $2 million, significantly less than its original price.