As far as artificial, or alien lifeforms go, I'm pretty sure Christina Aguilera is their leader who has "come in peace," but is waiting for the perfect moment to strike, and melt all our brains with some kind of raygun.
I mean look at her. She's just like the alien lady from Mars Attacks, and I can't believe that no one has put two and two together before. Maybe Tim Burton was really trying to warn us.
Seriously, take a closer look at these Christina Aguilera pics and just try and tell me she's actually human. Ain't gonna happen.
And check out more alien evidence in the rest of the Christina Aguilera pictures after the jump.