While the music world is waiting for his upcoming tenth LP, Life is Good, and is still tuning hard his new single collaboration with Common on “Ghetto Dreams,” a previously unreleased Nas track has recently surfaced, entitled “You Don’t Know.” Judging from the sound and certain shout outs, the Trackmasters-produced cut could easily stem from the late '90s. A rough version of this one dropped awhile back, but here's the CDQ version.