One of the biggest uses for YouTube is listening to music, and it's getting a bit more convenient to do that on Android today. YouTube Mix came to the desktop last year, but someone just threw the switch to enable it on Android. Simply search for an artists and rock out.
YouTube Mix is essentially an auto-generated playlist of an artist's most popular videos on YouTube. It seems to be mostly pulling up Vevo content for established acts, but the videos can be pulled from any account.