I believe
Supernatural
Last Goodbye
ALBUM RELEASE
Would have been the perfect case to achieve the most potential success. Supernatural would have garnered a **** load of controversy and would fare well on the charts. Last Goodbye would have caused a considerable amount of controversy cause it's very different sounding than ha previous singles, it sounds ****ing good and radio/iTunes would have eaten it up. It would have also given her a much greater perception from the GP. Then with those factors in mind - the album would have good first week sales and not flopped

Like compare this to the Bangerz singles then album release. Supernatural could have been her WCS, whilst LG could have been ha WB.
Then it sohuld have followed with:
Die Young
Crazy Kids
GTA/ToY