Fifty-five years ago Barbie Millicent Roberts first came out in the world of toys. Since then, Barbie doll, as everyone called her, has become the most famous toy doll in history. Her parent, the Mattel Company, said that 90% of all American girls between 3 and 10 have at least one Barbie at home. However, Barbie is facing some trouble at present, There are many similar   dolls on the market in competition with her. Another doll named Bratz, for example, came to life fifteen years ago. She looks more like today's pop stars with heavy makeup   and miniskirts. It seems that Barbie has lost her magic   among older girls. "For young girls, playing with a Barbie is much fun. But when you get older, you want something smarter and more modern," Says Vera Shepherd, a shopkeeper in a New York toy shop. It is good news that on the international market Barbie is still No. 1. Although Mattel is selling fewer Barbies in the United States these years, sales in other countries are still going up. In January 2009, Mattel opened its first Barbie store in Shanghai, where girls can shop, eat, drink or even become _ for their own Barbies. Mattel is planning big celebrations for Barbie's 55th birthday. Fashion designers from all over the world will make new dresses for Barbie. How long will Barbie stay popular in the world of toy dolls? It is hard to say, but 55 is surely not the age to retire  . Barbie's trouble is that  _  .
it wears heavy makeup and miniskirts. other dolls are more popular with little girls. other dolls are trying to beat her in the market. it is more expensive than the other dolls.