Katie Melua doesn't. She thinks she's actually an alien or something or other or something:
She said: "I don't even know if I'm human sometimes. I know that sounds mental, but I do believe we are all a bit like aliens."But if we're all a bit like aliens, then aren't all humans a bit like alien, and so feeling like that is human?
The United Nations have issued a statement in the last ten minutes, stressing that if it can be proven that Katie Melua has been sent to this planet by an alien intelligence, that will be viewed as a declaration of galactic war. "Unless they take her back, and James Blunt and Duffy as well as reparations" concluded the UN.