Gap teamed up with Groupon , to sell $50 worth clothing for 25$. And they also teamed up with foursquare
The chanel campaign , offered more for less , basically giving all customers a 50% discount on all new fall-winter 2015 looks . This rocketed their sales 82%.
Louis Vuitton's campaign , had a # trending on instagram and twitter , it was mostly to promote their 2015 spring-summer looks.
Gucci's campaign , was consisted of having customers pose with there Gucci product and hashtag it on any social media as #double. This promoted their spring look.
Fendi promoted their summer-fall look , by having rapper slim jesus say their name in one of his songs , by saying "That double F , hold up my strap" . Everyone started heading towards fendi after that.