Britney Spears has accused Justin Timberlake of cheating on her during their three-year relationship.

The singer, 41, made the claims in her upcoming memoir, The Woman In Me, which will be published on October 24.

Britney, who dated Justin from 1999 to 2002, didn’t name the person the hitmaker allgedly cheated on her with, referring to her as ‘another celebrity.’

According to TMZ, the star also said in her book she did not wish to name the woman because they have a family and she doesn’t want to embarrass them.

MailOnline has contacted representatives for Britney Spears and Justin Timberlake for comment.

In her memoir, Britney also revealed that had an abortion with Justin at the age of 19.

The star said she made the ‘agonising’ decision to terminate the pregnancy, after conceiving in late 2000.

She writes in an excerpt obtained by People: ‘It was a surprise, but for me, it wasn’t a tragedy. I loved Justin so much. I always expected us to have a family together one day. This would just be much earlier than I’d anticipated.

‘He said we weren’t ready to have a baby in our lives, that we were way too young. I’m sure people will hate me for this, but I agreed not to have the baby.

‘I don’t know if that was the right decision. If it had been left up to me alone, I never would have done it. And yet Justin was so sure that he didn’t want to be a father.’

The star claimed while she wanted the baby and ‘dreamed of having a family’ with Timberlake, he ‘wasn’t ready’ for the responsibilities of parenthood and thought the pair were too young.

The star said the abortion was ‘one of the most agonising things I have ever experienced in my life.’

It was also claimed in the book Spears reveals she was raised ‘not to get an abortion’ due to religious reasons and what she had learned from her family, reports TMZ.

Spears would later welcome sons Sean Preston, 18, and Jayden, 17 with Kevin Federline while Timberlake shares sons Silas, eight and Phineas, two with wife Jessica Biel.

Justin and Britney dated as teenagers after meeting at The Mickey Mouse Club and were an iconic star duo, but split abruptly in 2002 and rumours soon emerged that she’d cheated on him.

His career soared in the wake of the split, with albums and songs promoted under the narrative that Spears broke his heart.

In the music video for his 2002 hit Cry Me A River, he even used a Britney lookalike, with the singer herself vilified for their break-up.

In 2018, Timberlake said he was so emotional following his split from Spears that he unloaded his feelings by writing Cry Me a River in just two hours.

The former teen heartthrob’s hit song has long been rumored to be about the pop princess, following claims she cheated on him.

The star wrote of the breakup ballad: ‘I’ve been scorned. I’ve been p***ed off. The feelings I had were so strong I had to write it.

‘I translated my feelings into a form where people could listen and hopefully relate to it. People heard me and they understood it because we’ve all been there.’

Timberlake didn’t mention Spears by name in his book but made clear he was a changed man, crediting wife Jessica and  son Silas for his transformation, he wrote in Hindsight: And All The Things I Can’t See in Front of Me.

In 2021, Timberlake wrote in an open apology that he was ‘deeply sorry’ and would ‘take accountability’ admitting that he had ‘failed’ her, after their relationship came under fresh scrutiny following the release of documentaries looking into Spears’ conservatorship.