Avril Lavigne
The Canadian pop-punk singer who defined early-2000s teen rebellion with a necktie knotted over a tank top, chain wallets, and an I-don't-care-what-you-think attitude. Her 2002 debut Let Go crashed onto radio with "Complicated" and "Sk8er Boi"—instant anthems—and positioned her as the voice of a generation of mall-goers who wanted to be skaters but shopped at Abercrombie. Follow-ups Under My Skin and The Best Damn Thing kept her reign solid through 2007.