It's Barbie's big night, but will Lynn spoil it all? Barbie's in charge of the Dance-a-thon to benefit Children's Charities. She's ordered the food, planned the decorations and hired the bands - including her own. But the truly exciting part will be her spotlight numbers in which she'll dance solo with Ken. There's one person in town, however, who isn't happy about Barbie's big role and that's Lynn Madison. Lynn's a super dancer, and her father is one of the Charities' biggest supporters. When Lynn cuts in, will Barbie's good fortune take a turn for the worse?