One great side effect of Amazon’s new Music Unlimited streaming service is that it has considerably increased the number of songs available to Prime members through Amazon Prime Music. Yesterday, there were around 1.8 million songs in the Prime Music library that Prime Members can access for free. Now there are just over 2.2 million songs available in Prime Music. To make Amazon Music Unlimited a reality, Amazon must have made numerous new deals with record labels. It looks like those deals included Prime Music negotiations as well, so if there’s a song you’ve wanted to listen to that hasn’t been in Prime Music, you may want to take a second look.