So this is probably the one time I'll come back here to post about something because I'm admittedly not super interested in this forum but I did wanna let anyone on here know that there are now OIDIA stems available here:
https://britney-online.net/stream-download-flacoops-i-did-it-again-channel-stems-britneyonline13/
Britney Online posted them. I'm not entirely sure how these came about but they're definitely official. There's 24 tracks, all in mono I believe + all tracks are FLAC. There's a few background vocal tracks, lead vocals, drums, bass, everything. Some of the tracks are combined though, the piano hits are on the same channel as the snare and there's 4 channels with hihats and a bunch of other background things like the guitar, manic shots, and that rising sweepy sound.
I believe they were made by messing with some version of the song that's meant to have dozens and dozens of tracks but don't quote me on that
Like 80 percent of these tracks are stereo pairs. You can tell because it's two tracks in a row with the same source, i'm surprised they did not just stereo package it for you when they made the link. Do not listen to this in mono lmfao its gonna sound much worse