Re: What's the best way to make a photo the backdrop/mask?

Put the photo on a layer under the video. Then mask out the area of the video that you want to remove. If the area being masked out has a unique color, you should be able to remove it with something like the Chroma Keyer function. If the color being removed is not unique, you may have draw the mask. However, if the singer moves, I think you will have to adjust the mask to move with the singer's outline. At its worst, than means a frame by frame adjustment.