How old is Jennifer Lopez? Her age isn't evident in photos of the 40-something actress, who looks forever young. Jennifer Lopez's movies and TV shows are as popular as her songs, but the sexy star also makes news for her style--and her hair. Whether rocking a dress, a bikini or street-style clothing, she knows what looks good on her body (perfected with diet secrets and favorite workout). Her hair color, hairstyles and makeup are often emulated with DIY beauty tutorials. The entrepreneur also designs everything from shoes to bedding and perfume--all while being a busy mom to her kids (who are twins!).