Old Navy wanted to make its annual flip flop sale seem cool and appeal to a younger audience. So it partnered with three popular Vine comedians - David Lopez, Sara Hopkins, and Jessica Hansen - who each created an original Vine video promoting the sale. Over three days, the Vines received over 670,000 impressions on Twitter and gained Old Navy 2,100 new Vine followers, engaging over 60,000 users at a very low cost per engagement. The campaign was deemed a success at driving awareness of the flip flop sale.