Now that Spotify is on Apple's iMessage and Facebook's Messenger, the company will soon empower you to share and preview songs inside another messaging service, Skype. If you're a US-based Skype Insider with a mobile app version of 8.26 or higher, you'll be seeing a new Skype Spotify add-in soon; global Insiders will get the add-in later. Skype Insiders get early access to new features before they roll out to the rest of us.
When you're in a chat via the Skype app, you'll simply tap on the plus icon and then launch the Spotify add-in panel. Once you do so, you'll be able to search for songs, albums and artists, preview and share music and just play music. Of course, it's likely that you'll need a Spotify account to access the service via Skype, just like in the other apps.