Katy Perry Dons Fatigues, Prepares For Battle In 'Part Of Me' Teaser Introducing Private Perry! Pop superstar Katy Perry debuted the teaser-trailer for her "Part of Me" music video on Friday, which shows the Grammy-nominated singer preparing for battle in full-on army gear. The song has already been a huge success since Katy debuted it at the 2012 Grammys, shooting to the top of the Billboard Hot 100 charts in a matter of weeks. Its female-empowering lyrics have also caused some to wonder if the song is about Katy's ex-husband, Russell Brand. Will the video reveal a similar message? We'll find out when it fully premieres Wednesday evening at 7:23 PM ET on MTV. In the meantime, check out a preview clip in the video above!