Making of....QE II !

hi all, this week's Caricaturama challenge: Queen Elizabeth II!
Here's a slideshow exported from Lightroom, hope it works.
Made this last night, so I saved not often enough, but...you get the picture:
http://www.youtube.com/watch?v=89hOM_jjhOY

Anyhow, here's a sketch to show how it all started: