Photos of Jennifer Lopez on the Set of The Back-Up Plan in LA

Jennifer Lopez's Fit and Casual Back Up Plan

Jennifer Lopez headed back to her trailer between takes filming The Back-Up Plan in LA yesterday. She managed to look great even in workout gear — get her bod details here — as she checked in with the real world on her BlackBerry between takes. Jennifer took a break from acting when the twins were born, but she is making a mainstream film again and being on the set seems like a pretty effortless transition for the star.

More of Jennifer if you just read more.