This undated photo provided by Canturi Jewels shows a custom-designed...

This undated photo provided by Canturi Jewels shows a custom-designed Barbie wearing a necklace featuring a one-carat pink diamond, which will make the doll the world's most expensive Barbie when it goes on the auction block. Credit: AP

Big girls will LOVE this Barbie.

The curvaceous, custom-designed doll wears a necklace featuring a one-carat, purplish-pink diamond. She’s being offered at Christie’s auction house in New York on Oct. 20 for an estimated $300,000 to $500,000. Christie’s says that would make her the world’s most expensive Barbie.

All proceeds will benefit The Breast Cancer Research Foundation in support of Breast Cancer Awareness Month. 

Jeweler Stefano Canturi arranged the emerald-cut, fancy vivid diamond in a geometric pattern with smaller, white diamonds, totaling three carats. He also designed the doll’s black strapless party dress, stilettos, hair and other features. 

The world auction record for a Barbie is $17,091, set in 2006 at Christie’s London.

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