Are we back in 1999?

*NSYNC and the Backstreet Boys are feuding again, thanks to Joey Fatone's big mouth.

Joey was a guest on HuffPost Live on Thursday, where he was asked why he thinks BSB are touring again after taking some time off.

"I feel like they just need the money," Fatone said. "No offense, guys. But I'm saying, if you think about it, it's like, 'Why are you coming back out again?'"

"If you come out with an album, great, do it up," he added. "I think it was kinda cool to see Kevin [Richardson] get back into it, but it's always interesting to see what and how you're going to evolve."

Well those words didn't sit too well with Nick Carter, who took time from his honeymoon to speak out earlier today on Twitter.

Fatone was also asked the question that will never go away: Will *NSYNC get back together?

Considering what he had to say about Backstreet, his answer wasn't too surprising.

"4 out of 5 of us are married, everybody has their own careers, it's kind of tough to nail down what do we do, what do we wanna do," he said. "As of right now, it's not happening."

Whose side are you on? Vote below -- and see how all your favorite pop stars and teen idols have aged in the gallery above.

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