In the words of its co-founder Jia Shen, RockYou is a company about self-expression. RockYou began as a producer of slide shows for MySpace and today its widgets are used by over 30% of all social network users. RockYou serves a staggering 150 million widgets per day, that reach approximately 80 million people per month. RockYou is also one of the top 3 application providers on Facebook and is responsible for super viral apps such as the Likeness quiz and Zombies/vampires. More recently, the company launched its own Facebook-specific ad network, helping it to monetize its large userbase further. Jia Shen's advice to entrepreneurs is build your product first, to see if it works before raising any money.