The boy band is returning to the stage in a Las Vegas residency while also paying tribute to their 1999 album, “Millennium.” ...

The Backstreet Boys initially announced on Feb. 12 that their “Into the Millennium” Sphere residency would have nine dates.

“Millennium” was released ... include the original 12 songs remastered, live recordings, demos and the alternate version of "I Want It That Way." They also dropped a new song titled "Hey ...