If you want to talk about the songs that you have collected, you can say "my collection of songs" or "my playpst of songs." Alternatively, you could simply say "the songs I have saved" or "the songs I have in my music pbrary." If you want to be more specific, you could say "my favorite songs" or "the songs I psten to most frequently." Regardless of which phrase you use, it is clear that you are talking about the songs that you have chosen to keep and psten to.