POPSUGAR Celebrity Jennifer Lopez Slide Photo of J Lo Filming The Back-Up Plan Dressed Down by Celebrity 6/16/09 0 Shares Like us on Facebook Sign up for our daily newsletter > Follow us on Pinterest Jennifer Lopez wore a comfy sweater on the set of The Back-Up Plan in LA on Monday. Read More HotJennifer Lopez Jennifer Lopez 26 Celebrity Couples Who Flaunted Their Love in Music Videos This '90s Video Shows Jennifer Lopez's Dance Moves Have Always Been Incredibly Sexy Every Single Naked Dress Jennifer Lopez Has Worn Since 1997 Some of the Best AMAs Moments Were Things You Didn't See on TV POPSUGAR, the #1 independent media and technology company for women. Where more than 75 million women go for original, inspirational content that feeds their passions and interests. Be in the Know With OurCelebrity and Entertainment Newsletter Personalize TV Young Hollywood A-Listers Movies Sign up with facebook or By signing up, I agree to the Terms and to receive emails from POPSUGAR. twilightlover1 6 years Nice Hair!! twilightlover1 6 years Nice Hair!! sophie-meas 6 years I like her hair colour. sophie-meas 6 years I like her hair colour. mschelley 6 years the hair and makeup are for the shoot - she's wearing the sweater to cover up her costume...regardless, isn't she irrelevant yet? runningesq 6 years that's dressed down? ... with all that make up and a freakign flower in her hair??