one of my favorite shirts is losing its original print. So in order to keep the design, I embroidered around the print I wanted to keep before it disappeared in the wash. After doing so I decided that it would be cool to just embroider (or embellish) around some of the designs of other t-shirts. Just to give it that extra punch of color.
NOTE: I'm not great at embroidery, so I had to get a few books from the library to learn some of the stitch patterns, but being an old shirt, i wasn't picky. Therefore, I would probably practice first on some crappy shirt first if you're not a pro embroiderer like me. Especially since if you don't like it, and pull it out, the needle does leave some good size holes in the shirt. (depends a little on the fabric of the shirt)