O'Connor tore up a picture of Pope John Paul II on Saturday Night Live while shouting, "Fight the real enemy".
Her career did indeed go into the toilet after that. She also had a nervous breakdown and attempted suicide not too long after that incident.
It's funny, her career was soaring up to that moment, and she's never been the same since.
Yes, and it's very sad, but predictable, that a child who achieved so much success so early in life would find herself and her career in the toilet.
Especially with such a "mum" as she apparently has.
Didn't Sinead O'Connor do all this twenty years ago--just before her carer went into the toilet? 
"This bald chick - what's with her head? Let's start with the chick. What gives, cue ball? I'm looking at you, I'm thinking: fourteen in the side pocket!"
"I'll tell you what you better understand! Next time you see Old Glory riding up that pole, you better sing that anthem, darling! You're lucky you're a chick, or you'd be nothing but a stain on the road and a crewcut. Our founding fathers went to the mat for you, baby!"
"It's not my flag - I'm Irish."
"Oh? Well, then stay off of this stuff.. [ mimes drinking ] That's the curse of you people."