Heather Graham Grills Bradley Cooper, Ed Helms & Zach Galifianakis | NBC Bay Area

Heather Graham Grills Bradley Cooper, Ed Helms & Zach Galifianakis

Access special guest correspondent Heather Graham interviews her co-stars from "The Hangover" -- Bradley Cooper, Ed Helms and Zach Galifianakis -- about what makes them so funny. Also, why doesn't Bradley take off his shirt in the movie? Plus, Zach talks about meeting his Vegas impersonators

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