Last weekend's South by Southwest music festival down in Austin, Texas — the spring break of the music industry — was a blast, and you can read all about it on Jim DeRogatis' blog (and read and read and read). One of the crowning moments was this performance by Chicago's own hip-hop icon Kanye West ... which turned into a performance by Chicago's other hip-hop icon, Common ... which then included a visit by Erykah Badu who, literally, let her hair down ...