The `Price Tag` hitmaker washes her make-up brushes every day and always keeps her cosmetics in perfect order because she always likes to be prepared.
She said: "Never use a dirty make-up brush. I wash mine every night. I also have a little case with blushers, foundations, lipsticks and lip liners, all sharpened.
"I don`t sleep or go out because I`m constantly organising my life."
The 23-year-old star insists on keeping her home orderly and has even developed a special packing routine in order to make moving around as easy and tidy as possible.
She explained to Now magazine: "Don`t flat pack because then you have to unpack everything. Sometimes I have to unpack and repack within three hours so I have little cotton bags marked `tights`, `big knickers`, `G-strings`, `show bras` and `normal bras`.
"Then I pile up everything else so I can take them out as they are.
"I also take two empty bags - one for darks, one for lights - so I can just tip them in the washing machine when I get home. If my house was a mess and there was washing everywhere, I`d waste all my time sorting it out. People come round and ask me, `Do you actually live here or is it a show house?` "