When Kim Kardashian: Hollywood launched, many perceived it as a joke. But the app quickly climbed the download charts: Not only were people spending hours trying to become a virtual star by learning valuable skills like “smiling with your eyes," they were spending actual money to do so. In the first five days alone, the app reportedly brought in $1.6 million, paving the way for other celebrity apps from the likes of Katy Perry and Britney Spears.