If you've followed hip-hop over the course of the last half-dozen years, you need no introduction to Lil Wayne and DJ Drama's Dedication series. In addition to helping build Weezy into the hip-hop juggernaut he is today, the Gangsta Grillz releases--in particular the seminal Dedication 2--were instrumental in ushering in rap's current "Mixtape Age."

The YMCMB heavyweight has now picked up where '08's Dedication 3 left off with the hotly-anticipated fourth entry in the saga. The prelude to studio album I Am Not a Human Being II (due out before year's end), Dedication 4 finds Wayne flowing over industry instrumentals from Chief Keef's "I Don't Like," Ca$h Out's 'Cashin' Out," Meek Mill's "Amen" and "Burn," and many more.