carey wrote the song "fly away (butterfly reprise)" with famed house music producer david morales. when imagining the concept for "butterfly", carey intended the song to be a house music record, but after writing it, made it into a ballad. carey expressed a desire to feature her concept both on the house record, in addition to the ballad that would become "butterfly". morales took carey's lyrics, concept and melody and added a house beat to it. for the album, carey recorded a version of prince's "the beautiful ones", featuring dru hill's lead singer sisqó. the song was one of the last recorded tracks and was the only non-original song on "butterfly". the final song on the album was "outside", a ballad that was written by carey, afanasieff and rooney, about carey's experience being biracial. richard harrington from "the washington post" described the album's subtle inclusion of both pop and r&b genres: