Freezing on the Red Carpet

I was so surprised to hear that it's going to be a chilly evening tonight on the red carpet in Los Angeles. We're talking in the 40s people! My first thought was, what are the actresses going to be wearing to stay warm? Long sleeves, maybe? Or will they opt for a jacket or shawl of some sort? I personally know that if I were there I'd be wearing SOMETHING (anything) on my arms. I know that when my arms are cold it makes my entire body cold. I thought that these jackets would be totally wearable over a stunning Oscar gown and not distracting.

What do you think? What would you wear over a red carpet evening gown? Would you just wear long sleeves? Or would just suck it up, show your bare arms, and freeze for fashion?