MJ's Family Post-Sentencing Bonding ... at 'X Factor' Taping

11/30/2011 5:32 PM PST

Michael Jackson's Family -- Post-Sentencing Bonding at 'X Factor'

Michael Jackson's family has gone from Judge Pastor to Judge Cowell -- TMZ has learned the ENTIRE Jackson clan just arrived to a taping of the "X Factor."

Paris, Prince, Blanket, Katherine, Jackie, Tito and Marlon just sat down in the front row for tonight's live taping in Los Angeles ... just one day after Conrad Murray got the book thrown at him for killing the King of Pop. 

So why the surprise appearance? We're told Katherine LOVES the show ... and tonight, the contestants will be singing some of MJ's greatest hits.