"We’ve been asked about the possibility of a collab like this for the past 20 years and today is the day," the Backstreet Boys said on the new track.
At midnight on Friday, the 39-year-old pop songstress announced the reissue of the deluxe version of her 2016 album, Glory, which features her new song with the all-male vocal group, titled "Matches."
The electro-pop track features Spears' vocals intertwined with that of the Backstreet Boys as they sing about a dangerous love.
"'Matches' featuring my friends @BackstreetBoys is out now!!!!" Spears posted on Instagram following the song's release. "I'm so excited to hear what you think about our song together!!!! You can also listen to Glory Deluxe everywhere now ... including 'Swimming in the Stars' and the 'Mood Ring' remixes!!!! The love you guys have shown this album this year has been stupid amazing … like I can't even believe it!!! I hope it brings you joy. GOD BLESS YOU ALL!!!!!"