How should I submit the art supplement? Help!

<p>All my life I have been passionate about art and have devoted a huge chunk of my life to painting and drawing. This year, I'm a senior and applying to universities but am choosing the International Relations route instead. I still, however, want to submit an art supplement to show universities that I'm unique in some way.
Can I even submit one if I'm not going into art? I looked on the common app, and aren't really sure how to do this. Could someone please help me out?
I'm applying to American, Harvard, George Washington (common app), Georgetown (no clear answers on website), and Rutgers (no mentions of supplement).</p>