Originally Posted by
adamrice
If you've got tracks in the Music app on your phone, you can copy them (well, some of them—the watch doesn't have that much capacity) to the watch for playback, but you can also run streaming music services.
Just looked it up and tried it, the watch music widget (Instinct 2 Solar) can control stop/start/pause/advance/rewind/volume on whatever music is playing, iTunes, Spotify, etc...