I wonder if you really need a like or dislike button. I'm increasingly convinced they're both being used wrong. If you're listening to a random stream of songs there are only really two actions by the user that matter:

1. They keep listening. This is about the best "like" signal (IMHO); and

2. They skip to the next song. This is effectively a "dislike".

Both can be situational not absolute too. But what does like/dislike gain you beyond those two signals? Liking something requires the user to do something but users only really do something when they don't like what's happening. Requiring explicit action to keep playing songs like the current one seems somehow backwards.