The 'Who's Laughing Now' singer explained that she finds it relaxing to keep her home tidy.
"I'm obsessed with cleaning, I clean most nights," she told Top of the Pops: "I get quite obsessive about it to be honest. I love cleaning, weird but true. It really relaxes me."
The 23-year-old also insisted that she doesn't have any "boundaries" and is honest and open with everyone.
"My band has got used to me talking about farts and poos," she explained. "It annoys me when people are all girly about it. Everybody does it!
"I'll do interviews and say I need a poo, I'll go on stage and say my boob-tape is falling off, rather than US stars where it's all perfect. I don't want any boundaries."
Jessie J has announced plans to shave her head next year to help raise money for charity.
Listen to Jessie J's new track 'Domino' below: