I think there should be a way you can click one button and suggest a song to someone on your friends list within the app. When they login to the app, they can simply see it as a notification. Having to share a song via social media is frustrating sometimes. I realize from a marketing stand point, this may not benifit you. However, this fuction would be great for the user. It could also become a playlist of songs you have shared with a certain friend.