I WANT TO OPEN A PLAYLIST AND HAVE ALL MY FRIENDS BE ABLE TO ADD MUSIC TO IT. WE WANT O CREATE A COLECTIVE PLAYLIST. HOW DO I DO THAT? IS THAT AN ESPECIFIC KIND OF ACCOUNT? CAN SEVERAL PEOPLE UPLOAD MUSIC TO THIS ACCOUNT?
If you right click on your playlist, there is an option that says "Collaborative Playlist." Once you select it, you can share your playlist with your friends and they will be able to add music to it as well. I'm not sure if this is an option only for Premium users however. Try it out!