Ah, the flirty 30s. Check out some of our favorite stars who we can be sure didn't have a mental freak-out on their last day of being 29—thanks to their gorgeous skin, they are looking radiant as ever!

Kate, 33, was just 21 when she won a Golden Globe for her work as Penny Lane in Almost Famous. She'll always have that Golden Globe, and from the looks of things, her golden glow, also!

Learn more about SeroVital—the anti-aging skin product sometimes called "the fountain of youth"—here.