Must be an age thing, I thought the girls on the Sheilas' Wheels adverts were OK.
I personally get irritated by the new series of Sky adverts where they are pretending to be into energy conservation, particularly the pretentious 12 year old Oik, who tells you to switch everything off. Wonderful, when you consider that the one piece of equipment you can't switch off between use (if you want it to work properly) is your Sky digibox.