The death of Randy Rhoads during the tour for Diary of a Madman was a severe blow to Ozzy Osbourne, especially after the success of that album.  Jack Blades replaced Rhoads on guitar for the live recording, Speak of the Devil, but it was Jake E. Lee that was brought in to be a permanent part of Ozzy's band for Bark at the Moon.  However, behind the scenes, there was always Sharon, making sure her husband got all the credit and the band that did the heavy lifting got shafted.  Despite this the album still manage to do well and added a pop sheen to Ozzy's image.