The lineup for this year's installment of the Rock the Bells festival has been unveiled, and it's jam-packed with top-notch artists: Nas, Damien "Jr. Gong" Marley, the Roots, Common, and Big Boi of Outkast are just a few of the acts billed for the traveling hip-hop event.

Kanye West invaded Austin, TX, Saturday for the last night of South by Southwest. But rather than perform a set of standard Kanye tunes, the hip-hop star played host to new artists on his label G.O.O.D. Music, including Consequence, GLC, and Big Sean. And he invited friends like Common, Erykah Badu, Fonzworth Bentley, and Kid Cudi to join the party onstage.

Here's a rundown of the essential albums available online and in record stores this week:

What? Originally slated for a June release under the title Invincible Summer, Common's eighth studio album, renamed Universal Mind Control, drops today, six months late but with no less of a feel-good summer vibe.