Is it just us, or has Gwen Stefani found the Fountain of Youth? The 44-year-old singer has been in the music business since the late '80s, when she joined No Doubt, but you wouldn't know it by looking at her evolution over the years. Sure, Gwen has ditched the bindis and furry bikini tops she was known for in the late '90s and early 2000s, but much of her look — the platinum blond hair, the red lipstick, the rock-hard abs — and personal life has stayed the same.