I assumed when I bought it that I would be able to pick songs from a playlist or purchase a group of songs like when I purchased a disc on a PS3. It is picking the songs for me and they are a bunch of songs that I have no interest in listening to.
In Guitar Hero Live, when you play as a band in front of a live audience, you get to pick from two different music festivals. Of the two festivals, you get to choose from a few different bands that play 3-5 songs in a row. You can also play songs that you have unlocked in Quickplay. In GHTV, there are channels that you can play the songs of, sort of like a radio station. You can achieve credits that allow you to Quickplay any of the hundreds of songs in GHTV. I hope this helps, good luck!