What's your favorite "empowered" chick song?

I'm not necessarily looking for "angry" chick music, although that might work too. I'm making a compilation cd for my sis-in-law. So far, we have Carrie Underwood-Before He Cheats, Terri Clark-Girls Lie Too, Kelly Clarkson-Since U Been Gone, Pat Benatar-Best Shot, Alanis Morrisette-You Oughta Know, P!nk-Who Knew, Liz Phair-Extraordinary and some others. So, I'm looking for that sort of thing...sometimes angry, sometimes funny...something you can sing along with...something cathartic. Any help is appreciated. Telling me that the songs I like suck is not appreciated.