I am looking for some of the worlds best award winning ambient
advertising campaigns or promotional stunts. I am looking for
innovative ways companies have used to launch, promote their brands &
products.

* If they can be specific to the retail clothing industry, that would be great. 
* Please provide case studies or examples press coverage for the idea
as how the below companies have done.

An example of two types of companies already sourced doing this type
of is www.maverick.com.au , www.cunningstunts.co.uk.