I made the background transparent by adding another layer, and I used the crop tool to crop her arm off. I also blended around the edges to make a smooth feel and make sure as much of it is as white as possible, so it clearly stands out.
This is the final result:
I also did the same with my other pictures to add a sense of continuity and these are the final results:
The white background in this picture makes the band colours stand out and also the red drumstick and stands out, so you can clearly see it.







