Teenybopper (noun)

A young person, usually a girl, who is interested in popular music and fashion trends, often seen as frivolous or superficial.

Origin:

A blend of the words teen and bopper, first recorded in the early 20th century.

Examples:

1. She was a typical teenybopper, always talking about the latest pop stars.
2. The concert was full of teenyboppers, all dressed in the latest fashions.
3. He was not interested in the music of the teenybopper band.
4. The mall was full of teenyboppers, shopping for the latest trends.
5. He thought she was just a teenybopper, but she was actually quite intelligent.