Showbiz
Rex Features
The singer used Harley Street hypnotherapist Susan Hepburn to help her shed two dress sizes last year and is planning to use her again to aid her attempts to give up cigarettes.
Allen is reportedly struggling to ditch her 20-a-day smoking habit, despite announcing her pregnancy last month.
A source told The Sun: "She wants to crack this. She realises it will be a struggle but her baby is more important.
"Lily is aware that she is a role model and wants to portray a positive image of herself for young people to look up to."
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