Ozzy Osbourne is still rocking with his fans. The Black Sabbath singer made a rare public appearance amid his ongoing health battle, stepping out Oct. 12 for an autograph signing near Los Angeles. Sporting a black T-shirt, layered chain necklaces and his signature round glasses, Ozzy, 75, attended the Son of Monsterpalooza event in Burbank, Calif., alongside wife Sharon Osbourne, 72, as well as their kids Kelly Osbourne, 39, and Jack Osbourne, 38. And his loved...