Jennifer Lopez trades her high-heels for sneakers as she gets into character on set of new sports flick Unstoppable in LA

Jennifer Lopez arrives to set in trendy dirt covered jeans before slipping into black mini dress as she films Unstoppable at Biltmore Hotel in LA

Jennifer Lopez Calls New Album Her ‘Most Revealing’ (Exclusive)

Ben Affleck Tells Michael B. Jordan What He's Learned From Meeting Jennifer Lopez's Fans