Ozzy Osbourne and Busta Rhymes, 'Iron Man'
In 1998 Busta Rhymes cut "This Means War," which was built around the legendary "Iron Man" riff. To make it sound more authentic he even brought Ozzy Osbourne into the studio to sing new lyrics during the chorus. "This is the first time I've explored this area," Osbourne told MTV News. "I might get into a bit more now. It's a lot of fun."