Disgraced singer R. Kelly said he is “scared for his life” this week after undergoing an emergency operation to treat blood clots in his leg, RadarOnline.com has learned.

In a sudden development to come as Kelly serves a 30-year prison sentence in Chicago’s Metropolitan Correctional Center after being convicted of child pornography charges last year, the 56-year-old singer-turned-sex offender accused the prison medical staff of negligence.