I'd like to think that Mary-Kate snuck home to stay at her boyfriend's house after the Golden Globes Party and didn't want to leave his place still wearing her fancy dress, so threw on one of his t-shirts and wrapped his sheet around herself to drive home. Unfortunately, I think this "outfit" is far more deliberate than that. Sigh.
At least she's not limiting her early 90's trends to the Ray Bans, because it looks like she's bringing back the scrunchie, too. Finally, because I've totally been hanging on to my collection since middle school waiting for this moment.