The SXSW music festivities are about to begin in Austin so it's only right that Texas's very own Bun B kicks off the frenzy with a special set assisted by the one and only Just Blaze. Above, you can check out both gentlemen giving a live rendition of Jay-Z's UGK-powered classic "Big Pimpin'." Push the play button above and expect more SXSW coverage from us throughout this week.