So 30 Seconds To Mars' song The Kill is supposedly in C.
That's what all the chord charts say anyway. However I noticed that there is an F# in there. So this isn't in C major. If it were there would be an F. So the D would be a Dm which doesn't fit when played and certainly the F chord doesn't fit either. But since there is an F# wouldn't it be in either G or C Lydian? I'm a little confused about this. I understand modes well enough, so is it an assumed C Lydian or is everyone wrong and it's in G?
Thanks for all the help in advance.

By the way this is my first post. I will have a NGD here next week with my first PRS!! Really exited!