The ‘Not Fair’ hitmaker began taking the prescription medication which is usually prescribed to treat ADHD and narcolepsy after the birth of her two daughters, because it helped her shed the weight she had put on during her pregnancies.
But Lily who has Marnie, eight, and Ethel, nine, with her ex-husband Sam Cooper – has said she ended up taking the medication so often she became addicted, as the drug made her feel “invincible”.
She said: “I got married when I was 24 and I had a baby and a baby who died ten years ago this month and went on to have two babies.
“Six months after my youngest was born we ran out of money and had to go out on the road again and I was 14 stone and did not feel like a pop star at all.
“I started taking this drug called Adderall which is like speed to lose the weight and then I got addicted to this drug cause it made me feel invincible and I could work long hours.”
The 35-year-old singer also admitted things got worse when she joined fellow singer Miley Cyrus on her ‘Bangerz Tour’ in 2014.
Lily said the “highly sexualised” shows made her feel less attractive, as she didn’t consider herself to be “sexy” because her ne
She explained: “Then I ended up on tour in America supporting Miley Cyrus and it was a highly sexualised tour and I’d spent the last three years pushing babies out.
“I was supporting this girl who was much younger and more attractive than I felt and I just started acting out in all manner of ways.”
It was during the tour that the ‘Smile’ singer began cheating on her then-husband, and even considered taking heroin, which led her to realising she needed to go to rehab.
Lily who is now married to David Harbour told ‘The Recovery’ podcast: “I started cheating on my husband and I had always drunk alcohol to take the edge off the drugs.
“Then I realised I was going into the mini bar and drinking the mini bottles of vodka and without the drugs.
“I was in LA and thinking, ‘None of this acting out is working anymore. Maybe I should try heroin’.
“But because I had seen what happens to people who have taken heroin I knew it was time to confront whatever it was and my demons.”