Britney Spears' memoir slapped Justin Timberlake with a bombshell that proved "what goes around... comes around."

After Spears and Timberlake's breakup, the "Toxic" singer received the most hate as the former *NSYNC member hinted that she cheated on him during their relationship. But decades after their split, Spears' memoir finally shared the other side of the story.

Justin Timberlake Also Cheated on Britney Spears?

In the excerpt from Spears' new memoir "The Woman In Me," which is out on October 24, the book revealed that Timberlake cheated on the "Oops!...I Did It Again" singer during their highly publicized relationship.

As cited by a news outlet, the memoir revealed that Timberlake cheated on her with a celebrity - who reportedly has a family now. Spears refused to name the woman in question because she did not want to embarrass her; however, fans started taking steps to find out about her identity.

Timberlake previously sparked accusations that his ex-girlfriend cheated on him after dropping his 2002 hit song, "Cry Me a River." Meanwhile, Spears denied the claims through "Everytime" the following year.

Although Spears did not name the celebrity, fans already dug into Timberlake's past and found an old story proving that the "SexyBack" singer cheated on her first with All Saints' Nicole Appleton.

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Britney Spears Got Pregnant With Justin Timberlake's Child

The revelation came after another excerpt shared that Spears got pregnant and had an abortion while she was dating Timberlake.

"It was a surprise, but for me, it wasn't a tragedy," she wrote. "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. But Justin definitely wasn't happy about the pregnancy. He said we weren't ready to have a baby in our lives, that we were way too young."

Fans noticed that Spears gave them a hint in the music video of "Everytime," showing a woman giving birth at the end. She has yet to confirm the connection of the video to what happened to her.

Meanwhile, Timberlake has remained silent since the parts of the memoir were released. On the other hand, a source told Entertainment Tonight that he and his wife, Jessica Biel, are trying to move on while focusing on their family.

READ MORE: Britney Spears' Memoir Could Drop Bombshell Details About 'Toxic Romance' With Justin Timberlake

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