On the Jan. 29 episode of his Sirius XM show, "Ozzy Speaks," with co-host Billy Morrison, Osbourne, 76, admitted he was having problems walking but remained positive.

Ozzy Osbourne and Black Sabbath will headline a festival on July 5, featuring dozens of bands, including Metallica, Pantera, Slayer, Gojira and Anthrax

Yet that’s not to say that in his advanced age, Ozzy’s had it easy in the health department. Nagging physical ailments, in addition to an ongoing battle with Parkinson’s Disease, has forced the “Prince of Darkness” to cancel numerous appearances, kept him from the stage, and forced him to axe entire tours.

Ozzy Osbourne felt "overwhelmed" by the response from his friends in the music industry who have all offered to come together to join his huge Black Sabbath reunion gig in the summer.