Feisty songstress P!nk has revealed that her decision to stop smoking was an easy one because of her daughter, Willow.

The 'Blow Me (One Last Kiss)' superstar told Shape magazine that she was smoking a pack per day by just 13-years-old so it was a tough addiction to let go of, but she found support in a book that proved very effective for her:

"I quit when I got pregnant by reading Allen Carr's Easyway to Stop Smoking. That really worked for me. (And now) Willow makes me not want to (smoke). And besides, unlike before, cigarettes smell repulsive to me."

In the November issue of Shape, P!nk also opens up about how she maintains her enviable physique and walks readers through a strong workout for core muscles and abs.