Complex sentence: Gwen Stefani is a member of No Doubt performs on a band and solo, age 10-13 she listens to songs "Underneath It All" and "Hollaback Girl".
Split into simpler sentences: Gwen Stefani is a member of No Doubt performs on a band and solo. Age 10-13, she listens to songs "Underneath It All" and "Hollaback Girl".