Is apple gifting the watches to all the celebs or are they getting to purchase them ahead of everyone.
Regardless, now we know why there is such a shortage.
It is part of their marketing strategy. Device manufacturers have been doing this for years, several handset manufacturers used to have "styling offices" in Hollywood for this very purpose.
The units displayed by the celebrities were part of a manufacturing forecast long before the Apple Watch announcement.
They have nothing to do with your perceived shortage.