The band’s creative directors, Rich and Tone Talauega, better known simply as Rich + Tone, behind their newly-extended “Into The Millennium” residency spoke to The Post about the “challenges” they faced putting the show together, which included talking “acrophobic” Brian Littrell into performing at over 50 feet in the air.

With larger-than-life visuals — like giant dancing robots projected on the 160,000-square-foot interior screen and a futuristic platform levitating each member of the group about 80 feet in the air — and a 1,600 speaker sound system, Rich confessed that the team faced some “challenges” to make the residency come to life.

The boy band's "Into the Millennium" residency extension includes a New Year's Eve performance among seven new dates announced.