3. Mariah Carey’s $10 million Engagement Ring
When Mariah Carey became engaged to billionaire James Packer, it was the engagement ring that grabbed the headlines. The 34-karat diamond ring was made for the well-known diva at a cost of $10 million, and given to her by the most eligible bachelor hailing from Australia after several months of extravagant globe-trotting during which they attended many red-carpet events.
Too bad a ring this big can fail to deliver happiness. The couple split up seven months later amid rumours that Carey was cheating on her new husband with one of her backup dancers. To add insult to injury, she has no plans to give the ring back – keeping it as a souvenir instead.