It's '90s week on ABC's Greatest Hits, and there's nothing more '90s than the Backstreet Boys. (Except maybe NSYNC, but I digress.) On Thursday night's episode, the band took the stage to perform two iconic hits: "Everybody" and "I Want It That Way." Meghan Trainor joined them for the latter, and it's hopefully not the last collaboration we'll get from them.

"The first band that I loved was The Backstreet Boys," Trainor revealed in a behind-the-scenes video. "My pop star crush was Brian [Littrell]. I was gonna marry him and my mom was gonna marry him. That was our husband. The day he got married, I remember we were like, ‘Nooo!’"

Watch their performance below. Fun fact: Trainor, now 22, was only 5 years young when "I Want It That Way" peaked.

"Singing with The Backstreet Boys is definitely a bucket-list moment," Trainor said. Admit it — it's totally on your bucket list too, and you're kind of jealous now.