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Come on over, baby and see Christina Aguilera's reaction to Britney Spears' memoir.

During the Oct. 17 episode of Jimmy Kimmel Live!, the "Genie in the Bottle" singer was asked if she thinks she'll be in the "Piece of Me" artist's upcoming book The Woman in Me.

"Dude, I don't know," Christina told host Jimmy Kimmel. "I don't know." 

But does she hope to be in it?

"I don't know," the Grammy winner continued. "Am I hoping? I mean, I'm hoping that, you know, everything is all good with her and everything's beautiful. I think the future should be celebrated." 

Still, Jimmy didn't stop there. After asking whether Christina would prefer to be included in the book or left out, the late-night host joked he'd rather be featured in it if given the chance.

"Let's put it this way," Christina replied. "I'd rather be it you than me. So hopefully you'll be in it. You'll make the book."

Christina and Britney do have a long history together, with them both starring on the Mickey Mouse Club revival in the early '90s before being catapulted into superstardom by the end of the decade and continuing to dominate the pop music scene in the aughts. However, the two were often pitted against each other.

"When I was coming up, it was very obvious you know?" she told Jimmy in 2018. "Me and Britney were definitely—there was a Britney-Christina considered rivalry thing."

Indeed, Christina felt like they were treated differently in the press, especially after the release of her 2002 hit "Dirrty."

"It's hard to hear yourself being called names," she recalled to Cosmopolitan in 2018. "I remember being hurt by these commercials on MTV, pitting Britney as the good girl and me as the bad girl. It's like, if I'm going to be demure and innocent, that's okay. But if I'm going to just be myself, I'm trouble." 

And while Christina and Britney did occasionally take the stage together—including at the 2003 MTV MVAs with Madonna—their comments about each other in interviews fueled feud rumors.

However, Christina expressed her support for Britney following the "Gimme More" star's testimony during her 2021 conservatorship hearing. And after the 13-year conservatorship was terminated, Christina noted on The Enrique Santos Show that she has "so much respect and admiration" for Britney and that she "couldn't be happier for her."

The Woman in Me is set to be released Oct. 24—with Michelle Williams providing the narration for the audiobook.

"The Woman in Me reveals for the first time her incredible journey—and the strength at the core of one of the greatest performers in pop music history," a press release for the book read. "With remarkable candor and humor, Spears's groundbreaking memoir illuminates the enduring power of music and love—and the importance of a woman telling her own story, on her own terms."

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