T-Shirt dresses are the best. You can dress them up or down, and they're so comfortable.
I've been searching for one like this and finally found it at (where else?) Target.
My one suggestion for buying a t-shirt dress is to pick a size one or two sizes larger than you normally wear. Since I really like the look of loose-flowy dresses, I picked this one up in a size large and I'm loving it.
How would you style a T-shirt dress? Let me know in the comments!