Amy Adams Gives an Eyeful in Plunging V-Neck

The disco-era styles continue to steal the show on the set of David O. Russell's latest movie, American Hustle.

For instance, Amy Adams is the essence of 1970s chic in a brown dress with a plunging V-neck that leaves little to the imagination while shooting a scene outside a federal building in New York.

And, in this case, a hefty dose of cleavage would be about the only thing to steal thunder from Bradley Cooper's gotta-see-it-to-believe-it perm.