London, Apr 30 : It seems Michael Jackson’s career hiatus has taken away his dancing charm, for the king of pop has been forced to brush up his trademark moves for the upcoming London tour.

The 50-year-old singer has been looking at YouTube footage and vintage videos in a bid to prepare himself for his 50-night stint at the O2 in East London.

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

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

Meanwhile, Beyonce’s little sister Solange Knowles and Ne-Yo are lined up to do two of his opening acts. (ANI)