Katy Perry goes commando in the music video for "Part of Me," and I'm not talking about her lack of underwear.  After breaking up with her cheating boyfriend, Katy cuts her hair short a joins the Marines.  She makes the decision after seeing a flyer that says: "All women are created equal and then some become Marines."  Watch Katy go to boot camp, shoot guns and kick ass in the video below:

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Katherine Epstein ( @RTNowRadio) for Cumulus Media © 2012