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In his new autobiography, Out of Sync, Lance Bass opens up about Justin and Britney’s love affair. See an exclusive excerpt from the book below:

Justin Timberlake was still dating Britney Spears, his former ­“sister” Mouseketeer [in 2001]. At the time, she struck me as just this adorable little teenage girl at a perennial slumber party — staying up late and having lots of fun. She showed no signs of the turmoil she would eventually encounter, maybe because she was so in love with Justin she thought it was going to last forever.

I knew it wouldn’t. Justin already had a great love in his life — his career. He wanted to be a star, and no girl, no matter how great, was going to be able to distract him from that for more than a night or two between trips to the center of the spotlight.

But as I said, she seemed like the perfect girlfriend, especially when she wore her pajamas and hung out with the boys.