KEY POINTS:
Sharon Osbourne's music mogul father, Don Arden, has died at the age of 81.
The infamous rock manager oversaw the careers of acts like the Small Faces, the Electric Light Orchestra and Black Sabbath, fronted by Ozzy Osbourne.
He was renowned for his violent temper and estranged from his daughter for 20 years.
Osbourne, 54, fought her father to manage her rock star husband but was was reconciled with him in 2002, after he developed Alzheimer's disease.
