Not you using Wikipedia receipts tho Miley already said in a lot of interviews that she wrote it on a piano in Philly while Liam was shooting some random movie there (I think Paranoia? ). And isn't she credited on itunes as the lead writer as well?
However Luke did another song for Bangerz alled "Nightmare" that didn't make the cut, so it could be that one. But it got scrapped, so maybe not even Miley thought it was THAT good...
Not you using Wikipedia receipts tho Miley already said in a lot of interviews that she wrote it on a piano in Philly while Liam was shooting some random movie there (I think Paranoia? ). And isn't she credited on itunes as the lead writer as well?
Miley is not listed as a writer on ASCAP though...
And Sacha did write the song, I'm thinking this is the song he was referring to when he said Bey rejected it.
It reminds me of Rihanna's What Now. It sounds like a Rihanna or Pink song. I can't picture Beyonce singing it. Good thing she rejected it if true. Beyonce would sound weird on the song.
Miley already said in a lot of interviews that she wrote it on a piano in Philly while Liam was shooting some random movie there (I think Paranoia? 
). And isn't she credited on itunes as the lead writer as well? 
Its even one of her most tipical keys