Britney Spears -- Fit to Be a Bikini Mom

After all she's been through, Britney Spears really is in great shape.

With a healthy looking head of human hair, a sexy baby blue bikini and a belly piercing left over from her 2001 Dream Within a Dream Tour, the resilient 31-year-old mother of two showed off her sane curves and lucid, taut tummy while cooling off poolside at a Los Angeles area resort with her shirtless average joe boyfriend David Lucado this past weekend.