Heather Mills credits 'Dancing with the Stars' improvement to new leg

The secret of her dancing well in the U.S. television reality show "Dancing With The Stars," says contestant Heather Mills, is a new prosthetic leg.

Mills, estranged wife of Paul McCartney, earned praise from judges for her jive routine on Monday's program with partner was Jonathan Roberts, the Daily Telegraph said Tuesday.

Mills, 39, said she was "terrified" of performing the choreography and feared she would not pull it off. But after being fitted with a more flexible prosthetic, she said she had no problems.

During the dance, Mills seemed to wobble slightly only once and drew cheers when she performed a cartwheel.

Judge Bruno Tonioli said she should be renamed "the incredible Heather Mills."

"One, two, three legs, I don't care how many," he said, "you did a fantastic job."