The 18-year-old was not raised religiously, but she was very interested in religion for a while. Speaking on her podcast 'me & dad radio' with her father Patrick O'Connell, the singer said: "I don't know if any of you knew that - I don't think I ever spoke about it. When I was a little kid, I was very religious for some reason. My family was never religious. I didn't know anyone who was religious. And for some reason as a little girl I was very religious."
But this phase only lasted for a certain amount of time, Billie continued."At one point, I don't remember what happened, it suddenly went away completely." Although she is no longer religious today, the experience has helped her to be open to people with other beliefs and religious views. "I don't know why that happened. I don't know what drove me. And then, after a while, I became interested in other types of beliefs. I think closed people, people like me a few years ago was - I find it pathetic to be closed [to other opinions]. It's just weak. I love listening to people of different faiths. And I love talking to people and finding out what they believe." Even if she doesn't share this belief, she still loves to listen and understand, says the musician.