I recently discover a new site that I started posting to called Creative Allies. They do art contests for bands, films, festivals, etc. Too much fun for me to pass up. The first poster I did was for Ellie Goulding & Calvin Harris for their single "I Need Your Love".
The second was for Johnny Cash. I'm a big fan of his and I could not resist. It's for "A Boy Named Sue".
Hope to do many more submits (and win a few contests hopefully) for this site.