The Irish singer-songwriter paid tribute to "the very light of my life" on Twitter.
A New York Times profile describes a strange encounter between the two musicians from O’Connor’s upcoming memoir.
"This is the natural conclusion of any intelligent theologian’s journey."
The singer posted the video, in which she speaks of the stigma surrounding mental illness, last week.
Arsenio Hall has brought a $5 million defamation lawsuit against Sinead O'Connor over the singer's recent Facebook post accusing
You wouldn't know it because of the way we talk about mental health in this country -- the way we shame and mock each disorder, each symptom, each call for help. As a society, we have made a serious health condition something that is easier to hide than to address.
The singer has spoken publicly about the stigma of mental health issues.