It seems Britney Spears doesn't even have to release records for them to become hits anymore - an internet download of lost track (I've Just Begun) Having My Fun has become a hit on Apple's iTunes site.
Fans' speculation that the tune is a new track to be added to Britney's upcoming hits compilation has sparked interest in the song - even though it's over a year old.
The tune is actually from the In The Zone sessions, but the track didn't make it onto the finished album.
The dance song, which resembles Nn Doubt's Hella Good hit was produced by Bloodshy And Avant, but Spears had no plans to release the track.
(I've Just Begun) Having My Fun was made available to legal download site iTunes last week and it's currently at number seven on the popularity chart - and rising.
Britney's next single will be a cover of Bobby Brown's My Prerogative, which was also produced by Bloodshy And Avant.