Alexa will try to find the requested track on any service that's available to the recipient. If no match can be found then a station based on the artist’s name and song title will be suggested. The music sharing feature will work between Amazon Echo devices as well as the Alexa app. Unfortunately, if you're in Blighty you want be able to use this feature as it's only available in the US. But if you are based in the States and want to try it out here's how it works. To take this feature for a spin you just need to enable Alexa Communications.