Link accounts together

[karrus]

I have two Spotify accounts, one with premium and one without, is there any way I can link those two together? The first account (with premium) is used on/with an old facebook account while the account without premium is registered to the facebook account that I'm using now. And I want to show my friends on facebook what I'm listening to, but I don't want to buy premium on the other account since it's useless to have two accounts with premium. Is there any way I can link them together or show my friends what I'm listening to with my premium account, or do I have to buy premium on both?