Katie Price has been gorging on biscuits and curries, despite returning to a size eight just three weeks after giving birth.

The former model welcomed her fifth child into the world on August 4 and while she isn't sure how she has shed her pregnancy pounds, the star insists she is certainly not on a diet because she can't go without eating biscuits at night and she still likes to consume a curry every Friday.

She said: ''My body's shrunk back already, but I'm not really sure how. I certainly didn't ping back into shape after Jett was born.

''I'm looking after myself by being healthy in the day - but I can't stay away from the biscuits at night.

''I'm still wearing the size eight leggings I wore throughout my pregnancy under my bump and haven't changed dress size.

''I'm 100 per cent not on a diet.

''I'm not breast-feeding but don't think having a baby is an excuse to sit and eat junk food - I've done that before and I know it doesn't make me feel healthy or give me energy. However, I still have a chicken korma, rice and naan on a Friday night and proper Sunday roast, too.''

The 36-year-old star discovered her husband Kieran Hayler had cheated on her with two of her friends while she was expecting, and she believes part of the reason why she didn't pile on the pounds during her latest pregnancy is because she was ''under a lot of stress''.

Writing in her Now magazine column, she added: ''I know people may be surprised but don't forget, I was under a lot of stress during the pregnancy and didn't pile on the weight like I did with Jett.

''I've also been pregnant for nearly two years, so I think my body was ready to start getting back to my natural size.''

Katie also has 12-month-old son Jett with Kieran, as well as daughter Princess, seven, and other sons Junior, nine, and Harvey, 12, from previous relationships.