As one of rock's most iconic rebels, Joan Jett has constantly pushed limits—and plenty of buttons—with her mix of glam and grit, and that electric punk snarl. Her cool and calculated style were all over '90s alt-rock radio, with Hole's depraved spin on California dreams and Garbage's sleek, sinister twist on pop. It continued into the next century too, with bands like Paramore injecting punk with pure emotion.