Brides.com: Our Favorite Celebrity Engagement Rings. Ciara's Engagement Ring. Rapper Future (real name: Nayvadius D. Wilburn), Ciara's boyfriend of one year, proposed to her with a 15-carat diamond engagement ring. He popped the question while the couple celebrated Ciara's 28th birthday in New York in October. As soon as that whopper of a diamond was revealed, we couldn't help but compare it to that of Kim Kardashian!