Backstreet Boys reacts to Macaulay Culkin’s review of Las Vegas show

The Backstreet Boys had the best response to Macaulay Culkin’s enthusiastic and hilarious praise over recent Las Vegas shows.

On Saturday, July 26, the Home Alone star and his longtime partner Brenda Song attended the American vocal group’s Into the Millennium residency at the Sphere.

After enjoying the show over the weekend, the Hollywood Walk of Fame star recipient took to his Instagram to gush over the quintet, which includes AJ McLean, Brian Littrell, Howie Dorough, Kevin Richardson and Nick Carter.

The Backstreet Boys reacted to his post via their official Instagram Stories, writing, "So glad you both enjoyed the show! We saw @brendasong tearin it up in the suite!! You go girl!"

Song reposted the message on her social media platform, exclaiming, "I’m freaking out!"

In his Monday, July 28 post Culkin revealed that Song, 37, "literally cried" while enjoying a true fangirl moment.

Kieran Culkin's elder brother also raved, "I was mildly skeptical about the show, but boy howdy did they tear the place down. I was so very impressed."

"Five minutes into pilates I’m toast. I’m 45 but these men, who are my age, GO at it HARD for 90 minutes," he continued.

The 44-year-old former child star went on to playfully laud the all boy band’s on stage stamina, saying "Nothing is wasted; they use every part of the buffalo. Top-to-bottom, head-to-toe, floor-to-ceiling, soup-to-nuts, beginning-to-end, it’s incredible. They got it. They got it more than ever."

Song and Culkin also posed backstage with the band, all clad in matching all-white Millennium-era outfits.