Emma vs. Nikki vs. Kate

Who'd You Rather?

10/5/2010 4:00 PM PDT BY Johnny Lopez
"Nancy Drew" star Emma Roberts, 19, "Twilight" vamp Nikki Reed, 22, and "Brokeback Mountain" babe Kate Mara, 27, all hung out at the same event in L.A. the other day.

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Question is....