@ssd As a pp said, you have to subscribe to Amazon tunes. I think it's £3.99 a month. You then get access to more than 50 million songs though. I have it. Soooo worth it. You can ask it to play whatever radio station you fancy too.
I enjoy Smooth, Magic, Kerrang, Radio 2, Greatest Hits Radio, Classic, but also, you can ask it to play a Christmas station too. You can also get a white noise list too, in case your neighbour is being a bit noisy or shouty, or their dog is yapping!
Try saying ALEXA, TRY AMAZON MUSIC LIMITED, and it should give you the option to subscribe.
Or look here.
www.amazon.co.uk/music/unlimited/echo?tag=mumsnetforu03-21