 The second stage of the selection process is referred to as "the callbacks" (this round was referenced as "Vegas Week" for much of the show's run, as it was held in Las Vegas, but has been called Academy Week since season 13).The callbacks consist of a several-day-long process in which the remaining hopefuls are tested for overall well-rounded dance ability, stamina, creativity and their ability to perform under pressure.The dancers are put through a battery of rounds that test their ability to pick up various dance styles; these are typically some of the more well-represented genres that are later prominent in the competition phase, such as hip-hop, jazz, ballroom, and contemporary.