Social media hasn’t just changed how we communicate, but also what we listen to and how we hear it. With that, here’s our up-to-the-minute playlist of tracks making the leap from your social channels into the broader cultural stream. On top now is Justin Bieber’s tender track “YUKON.” Because there’s no schedule for going viral, our editors update these selections throughout the week as needed, so if you hear something you want to hang on to, add it to your library. If it’s trending there, you’ll hear it here.