In a new interview, the 33-year-old singer revealed that the song, which fans have been eagerly waiting since last November, would come out on May 5.
The duet is called "Pretty Girls" and will appear on Spears' new album that she's been working on "slowly but surely."
It's unclear when the follow-up to 2013's "Britney Jean" would arrive because getting it done isn't her priority right now.