The document discusses a case study of a music video widget client of Widgetbox, the largest consumer-facing widget platform. The client wanted to accelerate viral growth of its music video widget already on Widgetbox.com. Widgetbox ran a cost-per-installation campaign from June 15-26 using promotion on its site, in other widgets, and on Facebook and Bebo. This led to massive increases in hits, uniques, and subscriptions for the widget, which continued growing virally even after the campaign.