The group launched their Into the Millennium shows with a slew of emotions: "I started breaking down and crying because it was so emotional and surreal."

Preparing for liftoff with Millennium opener “Larger Than Life,” the global stars of our childhood blasted off with a 25-song set, christening Sphere as the first pop act to perform there.

Backstreet's back, alright. You might have thought the Backstreet Boys peaked in the early 2000s, but fans dressed in all white leaving Las Vegas' Sphere Friday night (July 11) would disagree. The group of five arguably put on their best show yet in the high-tech venue right off the strip.