Also, as an additional fact. There are two channels that upload fake Britney demos. One is "Demo Rejects" (mixes both real and fake demos, the best example i can give here is "Bullet" by Kerli since i've seen some people here liking Kerli's music) and the other one is called "Temptation" (which i think was the one who started the rumour of "Six Feet Under"). This latter usually uses tracks by very obscure musicians, songs that weren't for anybody or just directly other people outtakes (big example being a song called "Turn the Lights" which turned to be actually a demo by a very unknown singer called Nincina, which i very doubt it was for Britney considering its instrumental being purchased by those people who do "instrumental beats").