A quick idea: Spotify doing something similar to the “Pinned Tweet”:
Everyday, every usar can “pin” one favorite song.
The friends/followers can easily see other friends “pins”.
If the friend listen and like, they can “like” the pin. Those likes are counted.
Every 24 hours, the user can pin a new song…
The list with the history of previous pins can be easily browsed.
A ranking of most liked pins for every day/country etc. can be easily browsed.
Of course, this a rough draft of the idea and it might not work, but maybe it does.
Maybe it would be a fun and focused way for people to recommend music.