I listen to classical and film scores. I have 7.65GB just of John Williams and 2GB of Prokofiev, 3.85GB of Jerry Goldsmith, 1GB of Gustav Mahler. These guys all wrote a hell of a lot of music, pop musicians write 3 minute songs, these guys write 1 hour works. 😉
I have no trouble fulling 32GB... Infact I'm waiting for a 128GB phone so I can start using lossless compression...
And because these tracks can typically be any where from 1 minute to 20 minutes it doesn't make sense to count the 'number of songs'.