My last way to style a denim shirt is to add more denim. A couple of weeks ago, I mentioned that I was anxious to wear my boyfriend jeans with booties. Not only are boyfriend jeans cute, they are also comfortable. Since this is a lot of denim, I thought I would break it up a bit with a belt. I recently purchased this one from Express and have already worn it twice! I think another option, instead of the belt, would be to add a colorful sweater.