X-rated Zeta-jones strips off

CATHERINE ZETA-JONES has traded in hubby MICHAEL DOUGLAS for a younger model.The welsh actresse has hopped into bed with hunky co-star-JUSTIN BARTHA- nine years her junior.Their new flick,The Rebound follows a 25-year-old blake who start dating a mum of two after she hires him as a babysitter.But art doesn't quite initiate life,as wrinkly Michael is an impressive 25 years older than his wife.