iTunes 11 - Difference between "Play Next" and "Add to Up Next" buttons Is there a difference between iTunes' &quot;Play Next&quot; and &quot;Add to Up Next&quot; buttons? (See screenshot above). They appear if I right click an album and it seems to me that they do the same thing: Adding the songs of the album (or artist) to my &quot;Up Next&quot; line.

(source: m-i-u.de)
'Play Next' adds the song/album to be played directly, 'Add to Up Next' adds the song/album at the end of the songs/albums that have already been added to Up Next. For the first song/album, this will make no difference, but try adding a couple more and you'll see the difference.

In other words, 'Play Next' works as a stack - Last In First Out, while 'Add to Up Next' works as a queue - First In First Out.