Mary-Kate has been offered the chance of a lifetime: to be in a music video with super-famous rock legend Rodney Buckingham! But she knows that Rod's daughter, Lark, has a much better voice than her, and Lark should be in the video.
Mary-Kate decides to back out but every time she tries, the video producers just won't take no for an answer! Ashley, meanwhile, is having enough trouble trying to get the other two girls in her band to work together – how on Earth can they win the Pop Idol-type competition if they can't even decide how to dance, what to wear, what to sing . . .