What should I wear over my winter formal dress?

My dress is Light blue and very sparkly, it has an open back and no sleeves. I need some help on knowing what to wear over it because it is going to be very cold outside and I don’t want to freeze. Thank you :]

A white fur shawl or capelet.

http://www.davidsbridal.com/accessory_detail.jsp?stid=3049&prodgroup=181

this is also pretty!

http://www.davidsbridal.com/accessory_detail.jsp?stid=3842&prodgroup=181

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