MJ didn't want to be moonwalkin' at 50, says mum Katherine

Michael Jackson's mother, who testified before a jury for the first time on Friday, has revealed that her son would always joke about how he did not want to be moonwalkin' when he's 50.

According to Aceshowbiz.com, Katherine said that Michael always wanted to do something else.

Katherine is suing concert giant AEG Live for some 1 billion dollars or more claiming that the promoter behind Michael's ill-fated "This Is It" comeback concerts knowingly set up a dangerous conflict of interest with the doctor convicted of overdosing her son.

She called her wrongful death lawsuit against concert giant AEG Live the "most difficult" thing she has faced in 83 years, the New York Daily News reported.

AEG has denied any wrongdoing, saying it was Michael who personally hired Dr. Conrad Murray and secretly begged for the surgery-strength anesthetic that killed him.

Meanwhile, she smiled and wiped her mouth as her lawyer Brian Panish showed a video montage of early home movies and Jackson 5 performances on TV.

Katherine said that she is very proud of her son and wants to know what really happened to him.