The Backstreet Boys chat with ET’s Rachel Smith about their upcoming residency, ‘Into the Millennium,’ at Las Vegas’ Sphere, which kicks off July 11. The band teases what fans should expect and what it means to be the first pop act to play the venue. The Backstreet Boys also talk about rereleasing their 1999 album, ‘Millennium,’ with ‘Millennium 2.0,’ also out July 11 and featuring new songs.
