Oh, no, it's too late -- the aliens have already landed:
With the blankest of blank expressions on their faces, these mysterious figures have been popping up in the most unlikely of places.
The faceless mutants have a penchant for A-list celebrity bashes and have been spotted at Elton John's White tie ball and Harrods summer sale, opened by Sex and the City star Kim Cattrall.
I'd like to get some of those masks. They'd be a big improvement for some people I know. Yeah, yeah -- pot, kettle, etc.