I'm not an "artist" per se, but I sure can fake it by using BeFunky. All I have to do to turn my photos into a Warhol painting is upload my desired photo to BeFunky, then select "Warhol." Seriously, it's that simple. Plus, if I'm not feeling particularly Warhol-ish that day, I can turn my digital photos into an oil painting, sketch, or add a cool retro sunburst. Actually, there are so many cool ways to edit your photos on this site, I spent a good hour before deciding on an effect for this picture.
In addition to being totally fun, BeFunky allows you to put your pics onto magnets, tees, mugs, and stamps at really great rates — I could get this photo on a magnet for less than four bucks!