So You Think You Can Dance world's most popular dance competition show host Cat Deeley Returned as Host

So You Think You Can Dance is an American televised dance competition show that airs on Fox in the United States and is the flagship series of the international So You Think You Can Dance television franchise.

The series first premiered on July 20, 2005, was created by American Idol producers Simon Fuller and Nigel Lythgoe and is produced by 19 Entertainmentand Dick Clark Productions. The first season was hosted by current American news personality, Lauren S├ínchez; since the second season it has been hosted by former British children's television personality and one-time game show emcee,Cat Deeley. The show features a tiered format wherein dancers from a variety of styles enter open auditions held in a number of major U.S. cities to showcase their unique style and talents and, if allowed to move forward, then are put through additional rounds of auditions to test their ability to adapt to different styles. At the end of this process, a small number of dancers are chosen as finalists. These dancers move on to the competition's main phase, where they perform solo, duet, and group dance numbers in a variety of styles. They compete for the votes of the broadcast viewing audience which, combined with the input of a panel of judges, determines which dancers advance to the next stage from week to week. The number of finalists has varied as determined by a season's         format, but has typically been 20 contestants.
The show features a broad variety of American and international dance styles ranging across a broad spectrum of classical, contemporary, ballroom, hip-hop,street, club, jazz, and musical theatre styles, amongst others, with many sub-genres within these categories represented. Competitors attempt to master these styles—which are generally, but not always, assigned by a luck-of-the-draw system—in an attempt to survive successive weeks of elimination and win a cash prize (typically $250,000) and often other awards, as well as the title of "America's Favorite Dancer". In eight seasons, the winners have been Nick Lazzarini, Benjamin Schwimmer, Sabra Johnson, Joshua Allen, Jeanine Mason, Russell Ferguson, Lauren Froderman, and Melanie Moore. The show has won seven Emmy Awards for Outstanding Choreography and a total of nine Emmys altogether.
The program became the No. 1 rated show in summer 2006 for adults aged 18–49 during its second season but starting with season four it has slowly declined in ratings, although it still averaged over 5 million viewers per episode, as of season eight's completion. The show began broadcast of its ninth season, which features a return to a one-show-per-week format and other changes, in May 2012 and has seen a slight uptake in ratings over recent seasons, averaging between 6 and 7 million viewers per episode and securing a first place rank for ratings in its time slot for each of its initial five episodes.Spin-offs were announced starting in August 2005 and to date 23 localized adaptations of So You Think You Can Dance have been produced representing 24 different countries.