The meaning of your dream is obvious: You're in the process of "demoting" Jon because you now have a real-life "idol" to worship. Your fiance refused to take you to the concert, but he WAS with you -- in the form of the floor that you were "stuck" to. Your collapsing (and dying!) after Jon finally had to resort to pulling you onstage was your refusal to be "unfaithful" -- all of which means that you're definitely engaged to the right guy!