Sharon Osbourne, 71, recently announced that she and her husband Ozzy Osbourne, 75, will not be able to attend an upcoming fan convention which has sparked some concern over the former rock ‘n’ roll singer’s health. The 75-year-old made the decision in February 2023 to retire from touring after years of injury, illness and postponements due to having a major accident and damaging his spine. Announcing the news on a social media post, he explained: “This is probably one of the hardest things I’ve ever had to share with my loyal fans. As you may all know, four years ago, this month, I had a majo…