I love them both <3 :3

the best song of Katy Perry!

i think they are both very beautiful =) Side by side ... it's cool =)

BUT GAGA WAS AN ALIEN FIRST -.-

GA

Katy an alien ? Sorry but no, she has nothing original.

The best aliens in space are Gaga and the Doctor :P

Thats cool they look like they come from the same species

true (:

excurse me, no!!! katy has copied Gaga!!!

lady gaga <3 <3 <3

Gaga

if they make a movie about it...and they battle...who will be the winner..??

And E.T?

Ziggy Stardust and the Spiders from Mars disapprove this post big fucking time

sorry, but I like both

sorry no, I prefer gaga & oops I did it again britney