Lily Allen has revealed that she slept with female escorts while on her Sheezus tour because she felt "lost and lonely".
The 33-year-old told her 874,000 Instagram followers she was giving them a "heads up" after details were leaked to a newspaper.
Allen wrote: "Sooo, in my book 'My Thoughts Exactly' (out on 20 Sept) I detail some stuff from my dark days, around the Sheezus era. I slept with female escorts when I was on tour, cause I was lost and lonely and looking for something."
The Smile singer toured in Europe, Australia and North America in 2014-15 to promote her third studio album, Sheezus.
Allen went on: "I'm not proud, but I'm not ashamed. I don't do it anymore. The Mail are gonna run with the story tomorrow cause someone leaked it, and they're bound to make [it] sound worse than it was. Just wanted to give you Er, the 'heads up'!"
Allen recently admitted cheating on her ex-husband, builder and decorator Sam Cooper, while touring with Sheezus.
She told entertainment website Vulture: "I lost my sense of self. I lost my identity. I was being a bad mum. I was being bad at my job. I'd wake up on a tour bus in the middle of Wisconsin and be so hungover.
"I cheated on my husband. All I wanted to do was be with my kids. I wasn't even making any money."
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The couple, who share daughters Ethel, six, and Marnie, five, divorced earlier this year after seven years of marriage.
Allen's latest album, No Shame, which received largely positive reviews, was written during the breakdown of the marriage.