This April 2010 photo provided by Canturi Jewels shows international fine jewelry designer Stefano Canturi creating a custom-designed Barbie in his studio in Sydney, Australia. The Barbie is 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. On Oct. 20, 2010, Christie's in New York will sell the Barbie for an estimated $300,000 to $500,000. All proceeds will benefit The Breast Cancer Research Foundation in support of Breast Cancer Awareness Month. (AP Photo/Canturi Jewels) NO SALES

This April 2010 photo provided by Canturi Jewels shows international fine jewelry designer Stefano Canturi creating a custom-designed Barbie in his studio in Sydney, Australia. The Barbie is 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. On Oct. 20, 2010, Christie's in New York will sell the Barbie for an estimated $300,000 to $500,000. All proceeds will benefit The Breast Cancer Research Foundation in support of Breast Cancer Awareness Month. (AP Photo/Canturi Jewels) NO SALES