Sinead O'Connor, legendary singer of "Nothing Compares 2 U," dead at 56

Irish singer Sinead O'Connor has died at age 56, according to a family statement obtained by the BBC. 

Her cause of death was not revealed. 

"It is with great sadness that we announce the passing of our beloved Sinéad," the singer's family said in a statement. "Her family and friends are devastated and have requested privacy at this very difficult time."