50 years ago Barbie Millicent Roberts first appeared in the world of toys. Barbie, as everyone called her, has become the most successful toy doll in history.

According to Barbie's parents,the Mattel Company, 90% of all American girls between 3 and 10 have at least one Barbie at home.

In today's world, however, Barbie is facing an identity crisis. There are many rivals on the market. Bratz dolls, for example, came to life seven years ago. They look more like today's pop stars with lots of makeup and miniskirts. Today Bratz is a challenge for Barbie, as the company offers a wide variety of clothing too.

It seems that Barbie has lost her appeal to older girls. "For younger girls playing with a Barbie is much fun, but when you get older you want something more chic and modern," says a shop assistant in a New York toy store.

Indeed, sales have been going down over the past year, partly because of the world's economic crisis.

Barbie still has a lot going for her. More and more doll lovers all over the globe have become collectors. They trade Barbies or buy them on eBay. Other look for special and rare Barbie dolls, like Scarlett O'Hara from "Gone with the Wind".

On the international scene, Barbie remains number one. Although Matell has been selling fewer Barbies in the United States over the past year, sales in other countries has been going up. In January Matell  opened its first Barbie store in Shanghai, where girls can shop, eat or even become their own fashion designer.