Stacy Walker, the associate choreographer who worked on Michael Jackson's planned comeback concerts, has taken the stand in the trial spearheaded by Jackson's mother against concert promoter AEG Live LLC.

She explained that while the King of Pop had seemed a little slimmer than usual and was occasionally off with his dance moves, he gave her no reason to worry: "I just never in a million years thought he would leave us, or pass away. It just never crossed my mind."

Travis Payne, an associate director on the 'This Is It' concerts, added: "I thought he was thinner than he was in the past, but I didn't have any reason to be alarmed." He also told the court that "some days would be better than others."

During her witness statement, Walker confirmed that her role was to work with the dancers and not Jackson in particular so hadn't picked up on things like the others who took the stand before her: "I wasn't looking for things at the time. I wish I was."

Watch rehearsal footage from Jackson's proposed 'This Is It' tour here: