It's a boy-band bonanza!
One Direction performed Backstreet Boys' classic "I Want It That Way" at a recent concert in Stockholm, Sweden.
The boys honored a fans' request to sing the BSB song during a Twitter Q&A in the middle of the show.
But it wasn't just fans who took notice!
The Backstreet Boys themselves took to Twitter to compliment the Brits on their amazing rendition.
They wrote: "Heard @OneDirection did an impromptu performance of "I Want It That Way" in Sweden last night. Well done bros!"
And just like that, all is right in the world…