I had a dream where I was about to go on stage to perform a live concert. Before I switched, I actually used to be a voice major. In the dream, not only was I forced to perform this concert, but it was also in a nice concert hall and worst of all I didn't know any my pieces. I stood there and saw the audience shaking their head at me and then I woke up.
This dream is a reflection of one of your former real life fears. You most likely had some form of performance anxiety which make sense, and it is now manifesting itself as a dream. You might also hate disappointing people, another characteristic thats most likely taken from your real life persona and brought out in this dream.