The Florence and the Machine singer convinced herself she was able to breathe underwater, and made many unsuccessful attempts to prove to herself she had the unlikely ability.
She said: "I thought I could breathe underwater when I was a kid.
"Maybe it was a dream I had but I was convinced that it had happened once. So, every time I went to the local swimming pool, I would always nearly drown myself trying to make it happen again."
The `What the Water Gave Me` singer also admitted she is often left bruised after a night out because of her insistence to remove her shoes.
Recalling a recent party, she told Britain`s Vogue magazine: "I did end up, as usual, covered in bruises and with bleeding feet, which is how I tend to end most of my parties.
"As soon as I get into party move, I`m like, `Shoes gone! I don`t need shoes.` "
Florence believes she is going to find herself having fewer happy moments alone as her career progresses.
She said "I felt really happy today. I`ve had 45 minutes to myself and realised that I`ve been walking with my arms out and doing the occasional spin. I feel like that`s going to be happening less. But you take those moments when you can."