Nastia Liukin poses in front of a Hellcats sign with stars Robbie Jones and Aly Michalka as she attends the 2010 Supergirl Jam held at Venice Beach on Sunday afternoon (August 22).

The 20-year-old Olympian was on hand to sign autographs for fans before watching top female athletes compete in the competition which featured skateboarding, snowboarding and inline skating.

The Supergirl Jam is the largest all-female competition and lifestyle festival, designed to celebrate female strength, independence and empowerment.