It could be her song about Justin Beiber The song would suit her lower register and the ending could be adapted to her range and still sound good. I"m here for her working with this sound.
I can see "Good For You" sounding like a mix between this and "Thirsty" tbh
From the title I thought it would be a happy song like Carly's Good Time The Heart Was What It Wants was a step in the right direction. Hopefully she keeps it.
The song would suit her lower register and the ending could be adapted to her range and still sound good. I"m here for her working with this sound. 
The Heart Was What It Wants was a step in the right direction. Hopefully she keeps it.