My complete library of music is 131.65GB, which equates to 22187 songs.
However, its worth noting that this is a shared collection. Years ago i spent weeks on end ripping countless CD’s from every member of the family to make a home media server with all the music on for everyone. So its got loads of crap on that other family members have purchased.
My personal collection on my DJ laptop is about half that size. and my DJ collection of tracks i actually play is pottering around the 400 tracks mark.