With the success of the film Mama Mia, it's hard to believe that it's been almost two decades since the group ABBA went their separate ways.  Now, it appears as if die-hard fans will have new music to listen to;  Albeit an "old" "new" song.

The track in question will be a previously-unreleased song that will be included as part of the remastered album The Visitors -- which was their final release together back in 1981.

The song, "From a Twinkling Star to a Passing Angel," is described as a "demo medley" on the band's web site, and will mark the first previously unreleased ABBA music to hit the market since 1994.The track will be included among a disc of bonus songs; a DVD of archive material is also part of the reissue.