Jenna Jameson has posed for Playboy magazine just four months after giving birth to twins. The retired adult star showed off her super-slim post-pregnancy body at a provocative photo shoot for the racy magazine last week.

The 35-year-old blonde beauty - who has twin sons Jesse Jameson and Journey Jett with mixed martial arts fighter Tito Ortiz - has had a busy week.

Jenna Jameson says "500 sit ups a day" made giving birth easy. The former adult movie star - who welcomed twins Jesse Jameson and Journey Jette into the world on March 15 - boasts her strong stomach muscles aided the fast delivery.

She wrote on her MySpace blog: "I was blessed with a very easy labor, it lasted about 2 hours. When it came to pushing them out, I truly believe the 500 sit ups a day paid off. I was able to push my 5 pound Jesse out in 5 pushes. Journey who was 4lb 11oz was out in 3 pushes."

Jenna Jameson has named her twins. The former adult film star and mixed martial arts fighter Tito Ortiz - who welcomed the boys into the world on Monday - have named their babies Jesse Jameson and Journey Jett.

The 34-year-old blonde beauty gave birth at California's Newport Beach hospital and said she was "thrilled" to become a mother.