It's been 15 years since the death of Michael Jackson, the King of Pop. His music is singular, with blockbuster hits like "Thriller"... (SOUNDBITE OF SONG, "THRILLER") MICHAEL JACKSON: (Singing) ...

Kenny Ortega was a longtime collaborator of the late Michael Jackson. Now, he's sharing the most important lesson the King of Pop taught him before his death. Sitting down with the Chicks in the ...