Given it's electronic music, I was almost sure it would not sound too attractive as a piano solo piece, but welp, it does. I believe that due to the simplified character of the arrangements made by the modern publishers, even sheets like that can be made rich as solos and capture the original nicely. I would not list this sheet music as advanced so it's a good piece of practice time for a wide range of musicians, especially the younger fans of Katy Perri.