Rapper Wiz Khalifa revealed the first single Monday from his upcoming fourth studio album, titled "O.N.I.F.C."  Listen to the track below.  The album is set to hit stores August 28th on Atlantic Records.  Khalifa's last album, last year's "Rolling Papers," reached the top spot on both the R&B and rap charts, and peaked at No. 2 on the Billboard 200 albums chart.