By Jen Heger - Breaking Celebrity News Assistant Managing Editor

Judge Mitchell Beckloff reinstated Katherine Jackson as co-guardian of Michael Jackson's kids during a brief hearing in Los Angeles Thursday morning, Breaking Celebrity News is exclusively reporting.

The court-ordered investigator interviewed Michael Jackson's three children, as well as Katherine Jackson herself.

"It's clear that the kids love Mrs. Jackson and they are very well taken care of. They also love TJ Jackson (temporary co-guardian), and Mrs. Jackson is doing a terrific job with the children," Judge Beckloff said.

Katherine's attorney, Perry Sanders, told the judge, "TJ is very respectful to his grandmother and they have all worked well together."

Diana Ross met with Michael Jackson's kids Wednesday because she was named back-up guardian of the children in Michael's will.  Ross was satisfied during the meeting with the custody arrangement, and she formally signed off on it.

Last week, Katherine was stripped of custody of Michael Jackson's children, after they were unable to reach her on the telephone for more than a week. Katherine's grandson, TJ Jackson, was named temporary co-guardian.