The concepts and themes of the album began developing in December 2011. While performing a concert in Australia, Gaga previewed a song titled "Princess Die", a song with suicidal themes that was written about Princess Diana and her death. Gaga stated that the version of "Princess Die" she performed likely will not be included on Artpop, but a more upbeat dance version of the track may possibly make the final tracklist. She also declared that this album will demonstrate a "lack of maturity and sensibility", and that Artpop is contrast to the themes that were displayed in her previous album Born This Way. In November, Gaga revealed via her Twitter that she wrote over 50 songs to be considered for inclusion on Artpop.