Fashionably 30-Something

Catherine Zeta-Jones, Renee Zellweger and other stars look better today than they did in their twenties – PEOPLE style expert Susan Kaufman explains why. By Emily Fromm

JENNIFER LOPEZ, 36

A former In Living Color dancer, Lopez (left, in 1994) had a streetwise fashion sense. But now that she's a successful singer, actress, business mogul and fashion designer, she's gone posh – and embraced her curves. "It's about dressing up all the time for her audience and having that sense of 'I am going to be a glamorous style diva,' " says Kaufman of Lopez (in New York City in September).