What is the genre of the song "Why not me? - Carrie the musical? I've already looked through many pages but can't seem to find it.
This is a Broadway theater song, not a radio hit, but it's probably closest to the "Adult Contemporary" genre.
As has been mentioned elsewhere here, genre is often primarily based on marketing categories. This song would definitely be marketed primarily to theater fans --you might hear it on a "Theater Songs" internet channel.