A year after the announcement that they were working on an album together, yesterday Big Boi and Sleepy Brown treated us to a brand new single. lower case (no cap) features plenty to be happy about, from DJ Swiff’s bass-heavy production to Big Boi’s verse, which is laced with plenty of Outkast references. And to top it off, Killer Mike blesses the track with a feature. Check the lyric video to catch all the references for yourself. Streams are also available.