Backstreet’s back alright, and Macaulay Culkin and Brenda Song are thrilled about it. Culkin posted a joyous photo on Instagram of him and his longterm partner Song along with the Backstreet Boys at what appeared to be backstage at the boy band’s Las Vegas “Into the Millennium” residency at the Sphere earlier this week.

The couple attended the boy band's Las Vegas 'Into the Millennium' residency at the Sphere Macaulay Culkin raved about his visit to the Las Vegas Sphere with his fiancée, Brenda Song The couple posed with the Backstreet Boys after the group's Into the Millennium show Culkin said Song "literally cried" and admitted to loving the show despite being "skeptical" at first Macaulay Culkin is loving his return to the ‘90s!

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

Brenda Song danced to Backstreet Boys at the Sphere in Las Vegas while Macaulay Culkin stayed seated, creating a viral moment for fans