Former drug addict Fergie will battle narcotics for the rest of her life and still undergoes treatment to keep her clean.

The singer used ecstasy and crystal methamphetamines in her youth. Although she is now drug-free, the 32-year-old still undergoes therapy.

She says: “It wasn’t a quick fix, it was years of work and it’s continual. You don’t go in and out of rehab and then you’re done. I constantly work at things.

“I do hypnotherapy, which is a really big thing in my life. It works well with me because you go back into your subconscious and there are positive suggestions that are said to you. It really works for me.”

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