The `Who`s Laughing Now` singer finds it therapeutic and relaxing to go home and do chores such as vacuuming, dusting and cooking.
She said: "I love cheesecake - I keep making them at the moment.
"I`m also obsessed with cleaning, I clean most nights. I get quite obsessive about it to be honest. I love cleaning, weird but true. It really relaxes me."
Jessie, 23, also admitted she doesn`t have any "boundaries" with what she talks about because she doesn`t want to be seen as too perfect.
She explained in an interview with Top of the Pops magazine: "My band has got used to me talking about farts and poos.
"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 recently admitted she can`t understand why people are shocked that she doesn`t drink alcohol or take drugs.
She said: "Drugs and alcohol are not the epitome of an amazing life, they`re actually glamorised way too much.
"People go to me, `Oh my God, you`re in the industry and you don`t take drugs?` It`s weird to me that it`s seen as un-normal. It`s quite sad."
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