A music industry insider said, "So that Titanium song, Sia wrote it for Katy, but (Katy) didn't want to do a song with Guetta."
So the song was passed along to legendary singer Mary J Blige.
The insider added, "They sent it to Mary J. Blige who apparently butchered it, so they sent it back."
------
. "Party in the U.S.A." was originally intended for Jessie J, but after deciding it was not edgy enough for her, they passed it to Cyrus and adjusted the lyrics to fit her persona.
He confirmed that she recorded it and that it was hers to release in Summer 2011 but she didn't want it to be the lead single and then when he met Rihanna, he gave it to her.