DIY spray painted of July shirt; they sell this in t-shirt form at Wal-mart for 6 bucks. Easier to cut and make into a tank top rather than airbrushing; Use tape and stencils on a white shirt *use blue & red spray paint.
If you have long arms (like me) and a bunch of long-sleeved tees that don't fit after one wash and dry, you're gonna love this idea. DIY – Long sleeves to short. adding long sleeves to a short-sleeved shirt HAHAHA