Michael Jackson has reportedly been watching footage of old live performances to remind himself of his trademark moves.

After ten years away from the stage, the King of Pop's dancing feet are apparently out of practice.

“Michael is determined these shows will be spectacular," a source tells The Sun. "It’s over a decade since he performed a full-length show, so he’s forgotten a few of his moves.

“He’s watching all the old performance footage he can find in a bid to be on the form of his life this summer.”

Michael's This Is It shows kick off at the O2 Arena on June 8 and run until 2010.

Let's hope it's not Britney Spears' comeback all over again...