Ozzy Osbourne Cancels Concert Due to "Sudden Illness"

Fans weren't hearing Ozzy Osbourne scream on stage Sunday night. The singer canceled his Reno, Nev., show on Sunday evening after falling ill from an unnamed illness.

Ozzy, 62, could not fulfill his performance duties due to a "sudden illness," a promoter for his Scream tour said via E! Online.

Ozzy's also Tweeted the update to fans: "Unfortunately tonight's show in Reno has been postponed until April 23rd. All tickets will be honored for new date."

Ozzy also was stricken with Bieber Fever recently, as he filmed a Best Buy Super Bowl ad with the Justin Bieber!

Catch the newest featured track off Ozzy's Scream album, "Let It Die."