Honestly, I think the Metallica version is fuckin' clown shoes (no offense), and the original just sounRAB like whining from a guy that's living a dream. "Oh no. I have to tour around the world and make millions of dollars and bang strange women from all nationalities. Oh, poor me."
Other than that, Chris Cornell's cover of "Billie Jean" is rather impressive, the way he took a pop ballad and turned it into a smoky, bluesy and dark song which articulates the story a lot better.