Combining nu-metal with serious pop polish and structure, Alien Ant Farm always felt like a band that lived in two worlds: not quite heavy enough to be metal, but a little too fast-paced for the pop set. And while Alien Ant Farm's genre might be unclear, their entry in the 20th Century Masters series gives fans a bird's-eye view of their career and another opportunity to try nailing down what these guys were up to. Given the musicianship on tracks like "Movies" and their cover of the Michael Jackson classic "Smooth Criminal," while it might be hard to describe, it sure did work.