As we know that Kazumi Evans did the singing voice of Rarity and Princess Luna. She also did the voice of Octavia Melody, Adagio Dazzle, Moon Dancer, Rose and Wrangler. I am thinking that Kazumi could do the singing voice of Photo Finish and the voice of DJ Pon-3 as well as some new characters. Let me know if that would be a good idea or not.