Play iTunes play next I have several songs in the Play Next queue.

I am not playing anything at the moment. How do I play the queue. Clicking play prompts me with a dialog asking if I want to overwrite the plainest queue or play the song selected in iTunes, but I just want the play next queue
Open the up next queue and double-click on the title of the first song in the queue.

(In iTunes 12) the up next queue button looks like this:


It is in the top right corner of the playing now area of iTunes.