*NSYNC’s JC Chasez Attends Backstreet Boys Show in Las Vegas

Boy band worlds collided at the Sphere in Las Vegas … because *NSYNC superstar JC Chasez hit up the venue to see the Backstreet Boys … and it sounds like he was treated like royalty.

Our sources tell us JC watched the concert from James Dolan‘s suite … Dolan owns the Sphere, Madison Square Garden and the New York Knicks … so you already know those are good seats!!!

Before the show, JC went to dinner with his girlfriend, Jenn, his manager, Eric and President of Entertainment for MGM Resorts Ryan Abboushi … and at the Sphere, he posed for some photos with Nick Carter, AJ McLean, Kevin Richardson, Brian Littrell and Howie Dorough.

The BSB shows have been a huge success, and it looks like JC had a great time.

*NSYNC hasn’t been able to work out a reunion show just yet … and it will be interesting to see if JC’s experience here gets the ball rolling on that front.