I bought one of these a few years ago (I actually wore it in this blog post) and I love this romper. It is super comfy and simple. You can dress it up with a statement necklace and some great sandals or pair with converse sneaks and make it casual. PS: I cut the neck tie string off and always wear it strapless. This year I bought the romper in this pretty chambray-like blue and the striped style as well.
I have been buying shorts from Old Navy every summer. They wash really well, don't get wrinkled super easy, and they fit great!
I have these in every color. They are really long and flowy if you are trying to cover your booty. But, they also look cute tucked in or tied in a little knot to make them shorter. And, c'mon, you can't beat the price!