I'm not even an Nsync fan but I checked this out. He doesn't ever explicitly say it's not happening (or that it is happening). He just addresses the rumor. As in he talks about it. And tiptoes around saying it is not going to happen. In fact he sounds like he would want to do it.
So if it was actually going to happen, this is exactly the correct way for him to talk about it. He gave physical and plausible evidence for a "probable" start of the rumors, pushing the blame elsewhere.
And yeah he never actually said it's not happening. Just explained why people would THINK it's happening. However that is a good point of how gossip gets started. It may not be explicit but it doesn't sound promising, either.
Then again every fiber of my being is hoping that it happens.