Hugh Hefner bought an engagement ring that cost him a whopping $90,000!

Crystal Harris, the 2009 Playmate of the Month showed off the pricey ring on Twitter.

“For those of you who have been asking to see my ring here it is,” she Tweeted. “My engagement ring from my love.”

Hugh Hefner’s 24-year-old bride-to-be has insisted that she doesn’t want children. Crystal Harris agreed to marry the Playboy founder on Christmas Day, and said that she would rather have a successful singing career than children with the 84-year-old.

Says Harris, “I’ve never really been the wanting children type. I just have a bunch of different projects I’m working on and that’s fun for me so that’s what I’m going to do.”

She added that she would be happy to sign a pre-nup, explaining: “I’m happy. I have the singing thing going for me and other things so whatever he wants. I don’t care. Whatever.” The pair will wed at the Playboy mansion in the summer.