Michael Jackson's Kids Show 'X Factor' Some Love

Michael Jackson's children, Prince, Paris and Blanket, surprised "The X Factor" judges by attending the performance show Wednesday night, in which contestants paid tribute to the late King of Pop.

Judge Simon Cowell took to his Twitter account mid-show to say how great it was to see Jackson's kids in the audience. He wrote, "Just blown away. That was a massive surprise! I knew something was going on, but I didn't expect that."

For their performances, contestants sang two MJ songs each, including classics like "Black or White," "Dirty Diana," "Earth Song" and "Billie Jean." Later, Prince revealed that he thought it was all "a really well put together show and the performances were amazing". Watch Rachel Crow perform "Can You Feel It" by the Jacksons.

A very pretty Paris gave the night her seal of approval too by saying, "I thought everyone was absolutely fantastic." She tweeted about Simon, "I realize he might not be always nice, but he's being honest, and that's his job."

Other Jackson family members were there as well, including his mother Katherine, sister Janet, and a few of his brothers.