Jackson 'rehearsing moonwalk for O2 gigs'

Michael Jackson has reportedly embarked on an intensive training regime in order to perfect his signature moonwalk dance before his London residency this summer.

According to the Daily Mail, the 'Thriller' star has enlisted celebrity choreographer and High School Musical 3 director Kenny Ortega to whip him into shape for his 50 concerts.

"He is spending hours watching his past performances and videos because he wants to put on a show that is as good as - if not better than - those he’s done before," said an unnamed source.

"He is determined he’s going to do the moonwalk because the fans will go crazy for it... The shows will be his swan song so he wants them to be the best ever."

Jackson, 50, last performed the moonwalk at a concert in September 2001. A representative for the star has declined to comment on his tour preparation.