Ozzy Osbourne, 74, looks frail as he takes a walk without his cane amid Parkinson's battle

Ozzy Osbourne Is a Rockstar Grandpa! The Cutest Photos of the Singer and His Grandkids

Sharon Osbourne Enjoys Easter Breakfast With Her Grandkids & Ozzy In Rare Family Photo

Metallica, AC/DC, Guns N’ Roses, Tool, Iron Maiden, Ozzy Osbourne Announce Mega-Concert Called Power Trip