Backstreet Boys are showing their gratitude for everyone who has come to see their Into the Millennium residency at Sphere Las Vegas so far.
In an Instagram post, the group shared a carousel of photos showcasing some backstage snaps and the famous faces who came to support the show. The celebrity special guests included John Mayer, Usher, Post Malone, Dan + Shay, and Macaulay Culkin and Brenda Song.