Yes, Ozzy Osbourne. The Black Sabbath heavy-metal king has made a cover of Lennon's "How," available Tuesday on iTunes to benefit Amnesty International.
Osbourne says Lennon was a "driving force for humanity." He also credits the Beatles as the inspiration for his musical career.
A video for the song is debuting on AOL's PopEater.com.
The former Beatle would have been 70 on Saturday. He was shot to death in December 1980.