are you posting cos maybe some guy will hear this and use you in a project of theirs ? (just interested as to why is all)
i listened to 4,your inbuilt pitch is pretty good ... think "turn around" is the wrong song for you,but if you flattened the backing track by a few cents it would make the world of difference to you while tracking,you seem to be struggling to hit the pitches (imo it aint you cos your inbuilt pitch says "this" but the backing says "this" then the fight started ... )