It’s officially less than 1 month until Backstreet Boys relaunch their mega-successful Millennium 2.0 Residency at the Sphere, Las Vegas. As we get ready to be sent back into orbit around the Millennium era with our favorite group of boys, we are taking a look back at all the (many) celebrities who joined us in gushing over the Backstreet Boys Out-of-this-World Y2K experience.
Early in the run, fellow Las Vegas residency performer Usher attended, returning the favor from when Brian Littrell saw his show at the Coliseum a few months before. Usher and his partner were all in for I Want it That Way. John Mayer attended alongside Usher, posing with the boys together.
Fellow 90s royalty, Danielle Fishel, Rider Strong, and Will Friedle of Boy Meets World and Pod Meets World fame, joined the audience and even did a quick podcast with AJ and Kevin. Hear their recap podcast HERE and listen to AJ and Kevin on the show HERE.
Becca Tilley and Tanya Rad from the Scrubbing In podcast which is a Scrubs recap podcast also interviewed AJ McLean following the completion of FOUR shows where they rocked their bodies! They shared insights they learned from their visit.

Macaulay Culkin, most notably known for his role as Kevin McCallister in the first two Home Alone movies and his wife, Brenda Song, also an actor, originally of Disney Channel fame, enjoyed the show. Brenda was, very appropriately, fangirling out throughout the show and it was fantastic to see her relate to just about all of us!
Anthony Ramos, who played dual roles of John Laurens and Phillip Hamilton in the original Broadway production of Hamilton, was in attendance the same time as AJ McLean’s family. He shared that his daughter Lyric happens to be a huge fan of Hamilton and although she acted cool and collected upon meeting him, she was fangirling inside over seeing him there.
Max Martin, who is partially responsible for the Millennium album the boys were celebrating with this show, was also able to catch it in the middle of the run. The boys gave a nod to him, thanking him for all his work with the boys over the years. This may have been a rekindling of their partnership, as the boys were recently seen at his LA music studio.
Another musical production superstar, Babyface, showed his face at the event. Brian Littrell has noted Babyface to be a big influence of his in the past. Babyface attended with Boyz II Men’s Wanye Morris, who has worked with Nick and AJ before, and comedian Jo Koy. Babyface posted the proof on his page.

Ashton Kutcher and Mila Kunis were adorable in the suites when they came to see the show. Mila was living her best fangirl life, and Ashton was right there with her!
Chrissy Teigen, who has famously questioned the I Want it That Way lyrics (along with the rest of the world) had the time of her life at the show. The boys answered back, serenading Chrissy from afar.
Holly Madison who became famous as a Playboy Bunny and partner of Hugh Hefner, shared a video chronicling her time there. She seems to have had a great girls night out!
Perez Hilton brought his kids to the show in a full circle moment. Perez was undoubtedly there at the first Millennium show, so bringing his kids to 2.0 was probably a fun night! He posted a review on his site.
A rather random, yet perfectly lovable pairing of Backstreet Boys and Flava Flav was unveiled during last year’s Christmas season. Flava Flav, an avid BSB supporter as it turns out, came out to show his love and appreciation of the boys. And in turn, the crowd showed their love and appreciation for him.
Other, seemingly distantly related musical artists that attended included Post Malone and Dan and Shay, who saw the show at the same time, posing with the boys together. Diplo posted video of Quavo when they went to the show opening weekend. Geezer Butler, guitarist from Black Sabbath, even made the trip out to see the boys. We love to see legends respecting legends! Looks like they all had a great time at the show!
Luka Doncic and members of the NBA Lakers team celebrated his massive contract extension in Las Vegas with the boys. Doncic had previously shared he was a big fan of BSB, and his organization took the opportunity to congratulate him on his contract by taking him to the sphere. BSB took this chance to show us that NBA players really are a lot taller than we thought.

No less than 3 members of that other boyband from the 90s, N’Sync, came to show their support, and pledge their awareness that Backstreet is indeed the winner of the boyband clash. Lance Bass attended multiple shows in the first two weekends, and Joey Fatone and JC Chasez each attended as well. Joey was seen bowing down to the boys as they flew 100+ feet in the air during I Want It That Way. Luis Fonsi, an old friend of Howie D’s from his early/pre-Backstreet Boys days joined the audience alongside Joey Fatone.
In addition to N’Sync, other notable boyband stars came to see the show. Jeff Timmons, of 98°, who also lives in Las Vegas, was in attendance and Ashley Parker Angel from O’Town shared some great moments from the show.
As you can clearly tell, BSB have shown themselves to be a strong presence in the music industry going on 33 years strong. We can’t wait to see who shows up to support our boys this round!
Will you be there too?
