I sometimes play this game with my own collection!
Nirvana - Nevermind
Either me or my older bought a CD-R of this with badly printed artwork from someone in school, which was the style at the time (2001ish)
Oasis - Definitely Maybe
Oldest brother bought this (from a shop), probably around 2000/2001 as well, because I got massively into them in 2002 when Heathen Chemistry came out.
Alanis Morissette - Jagged Little Pill
Never owned a copy.
The Strokes - Is This It
Oldest brother had a CD-R of this that someone gave him, with no artwork or tracklist. As a result I’ve heard the album many times but largely don’t know which track is which from the tracklist, aside from the obvious ones, which is unlike me. However I also bought a copy of this album in Poundland early last year in preparation for going to see them last Feb.