Of the many shocking shake-ups in the music world last year (remember when Fifth Harmony was a five piece?), the announcement of 2NE1's disbandment was one of the hardest blows dealt to the K-pop scene and beyond.

Now, it seems the talented troupe is pulling a Spice Girls and releasing a proper farewell on January 21 in the form of — what else would you call a swan song? — "GOOD BYE."

A new report from Star News today (via Soompi) reveals that the song was originally intended for CL's eternally stalled U.S. solo endeavor, written by the "Hello Bitches" superstar "as an outlet for the leader’s feelings of regret about the end of 2NE1."

The group's label, YG Entertainment, ultimately felt it was a suitable last song for the group, and Sandara Park and Park Bom were called in to record the track as well. (It's unlikely that Minzy, who did not renew her contract with the label, will be included.)

"GOOD BYE" was reportedly produced by J Gramm (Travis Scott, DJ Mustard) and K. “Rook Monroe” Watkins, who also co-wrote Rihanna's ANTI anthem "Desperado" and Kid Ink's "Nasty." (Based on the contributor's credits, it sounds as though the song's going to sonically skew into #SomethingMoreUrban territory.)

It's bittersweet news, but hey: one last hurrah is better than nothing at all. Or is it?

2NE1 Through the Years: