Active Duty is the eighth release by M.C. Hammer (on November 20, 2001). Overall, it marks his seventh studio album and ninth record, including the unreleased Too Tight (1996).
Following the September 11, 2001 attacks, Hammer released this album on his own WorldHit Music Group label (the music enterprise under his Hammertime Holdings Inc. umbrella) to pay homage to the ones lost in the terrorist attacks. The album followed that theme, and featured two singles, "No Stoppin' Us (USA)" and "Pop Yo Collar" (featuring Wee Wee). "Pop Your Collar" became a popular "buzzword/catchphrase" during this period.
The album, like its predecessor, would not sell as many copies as previous projects. Hammer did however promote it on such shows as The View and produced a music video for both singles.