The 23-year-old actress plays the wife of Christian Bale, who is a conman in the film, reported Ace showbiz.
"I can't tell where it came from because I just kind of started speaking in it, and I've been watching a lot of reality TV shows and those reality TV shows have a lot of New Jersey women. So I can't say that it's not from them," she said.
"American Hustle" has collected seven nominations at the 71th Annual Golden Globe Awards. One of them is Best Supporting Actress for the actress.
It also stars Bradley Cooper, Amy Adams, Jeremy Renner, Louis C K and many big stars.
Based on the FBI ABSCAM operation of the late 1970s and early 1980s, it follows brilliant conman Irving (Bale) and his lover Sydney (Adams) being recruited and forced to work for FBI agent Richie (Cooper).