This app should exist:

Have you ever had to download an entire album, only to listen to your 2 favorite songs? This often takes up space and costs money that could be saved. With this app you can select only your favorite songs, create your an album of those songs, and that download them. This is quick and easy and the songs are free to download. The app itself is only 5.99 for all these songs.

 Whether you like Taylor Swift and One Direction, or mcr and bmth. You can download a symphony or your favorite country music all in one place. This app could be used by anyone of any age, all at the touch of a button. (Something like this probably already exists but I am yet to find it.)