When Sinéad O’Connor was 23, she gained international attention with her rendition of Prince’s song “Nothing Compares 2 U.” She soon became a Grammy Award-winning artist known for her singing as well as her looks -- including her shaved hair -- and her onstage antics.

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In an exclusive interview with Dr. Phil, the singer reveals why she keeps her head shaved.

“When we were children, my sister had beautiful red hair, glorious red hair. That’s why I’d be jealous of her,” O’Connor shares. “But my mother took it into her head that my sister’s hair was ugly, and horrible and disgusting. And she started, when I had long hair, she would introduce us as her pretty daughter and her ugly daughter. And that’s why I cut my hair off. I didn’t want to be pretty.”

On Tuesday’s episode, O’Connor opens up about her childhood, claiming that she suffered abuse at the hands of her mother daily. And, she reveals that she was raped as a child numerous times.

WATCH: Why Sinead O’Connor Says She Was 'Devastated' When Mom Who She Claims Abused Her Died

“It’s dangerous to be pretty, too, because I kept getting raped and molested everywhere I went,” the Irish singer continues. “I didn’t want to be raped. I didn’t want to be molested. I did not want to dress like a girl. I did not want to be pretty.”

In the video above, O’Connor says her appearance was also questioned by those in the music industry.

Watch O’Connor’s entire interview on Tuesday’s episode of Dr. Phil. Check here to see where you can tune in.

Sinéad O’Connor Claims She Was Beaten Daily By Mom: ‘She Ran A Torture Chamber’