fitness and health : 30 years old star, who is the hottest?

With a full a head of hair, two kids to her name, and barely a wrinkle on her face.

• Britney Spears has turned 30
• Beyonce
• Paris Hilton
• Natalie Portman

still like so sexy at age of 30 and have the good fitness , the question is who is the hottest?