She may be over her much younger boy toy, John Mayer but their romance may come in handy when she needs to channel her character in Pumas --a film about thirty something ladies dating younger men.

Jen has described the movie as a female version of, "Wedding Crashers" which starred her ex, Vince Vaughn.

But, how much younger can thirty somethings go?  Are cougars and pumas chasing the same 24-year-old tail?

Check out the latest pictures of Jen on the set of The Bounty in Harlem today.

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