Jack Black Ozzy Osbourne 's "Mr. Crowley" during the birthday party of Mary Morello Tom Morello 's mother , who celebrated her 100th birthday.
Tom Morello used social media to share a video of the Tenacious D and actor paying a beautiful tribute to his mother and then singing Osbourne's hit song.
Roman , Morello's son, also participated in the band with Jack Black playing guitar. Internet sensation Yoyoko played drums while Roya Feiz was on bass and Hugo Weiss on keyboards.
The performance, reminiscent of School of Rock , comes as he celebrates the film's 20th anniversary. The iconic School of Rock tells the story of a teacher who uses music to teach children.