Actress Olivia Wilde attends the 10th Annual Chrysalis Butterfly Ball on June 11, 2011 in Los Angeles, California. (Getty Images North America)more pics » Olivia Wilde Olivia Wilde
looked beautiful, as always, in a print evening dress with a sheer back for the Butterfly Ball. The dress, by Yigal Azrouel, featured a small all-over print and sheer puff sleeves.
We've spotted other celebrities with a similar look, including Penelope Cruz, Angelina Jolie, and Claire Danes. Check out all 1956 pictures in the Evening Dress Lookbook
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