Kelly Clarkson has confessed to eating a cannabis cookie. The original 'American Idol' winner admits she has experimented with marijuana but doesn't class it as taking drugs, because it is not a Class A substance.

Kelly said in an interview with USA Weekend magazine: "I have eaten a marijuana cookie."

"It was in Amsterdam. It is legal there, and it is not legal in America. I don't ever do anything illegal at home. Since then I have been oregano-free!"

"I have never smoked anything in my life. I've never tried any drugs. I wouldn't do anything that would cause holes in your brain or your nasal cavity. Call me Texan, but I don't think of marijuana like that."

The 25-year-old singer also revealed she refuses to be pressurized into dieting to become a size zero.

She said: "I have never been to a point where I have been so unhappy that I have said to myself, 'Oh God, you are fat!' I don't allow myself to go there."

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