By Joanna Weiss, Globe Staff
Lindsay Schrier, a 10-year-old from Quincy, wants to be a librarian when she grows up, or a writer, or an acting-and-singing superstar. So when she flipped on the Disney Channel one day last summer and discovered "Hannah Montana" -- a sitcom about a teenage girl with a secret life as a pop sensation -- she could instantly relate. Before long, she was perfecting her "Hannah Montana" choreography.
Hers is not the first household to report a new infusion of squeaky-clean pop. That's the sound that surrounds many 'tween girls these days -- that, and the clink of cash registers. The "Hannah Montana" soundtrack debuted nationwide last week as the number-one album on the Billboard charts, beating new CDs from MTV fave My Chemical Romance and Grammy winner John Legend. It was the first-ever television soundtrack to debut at number one.