Plot: After five two-hour audition shows, it was down to the final 20 performers who will vie for the title and $250,000 on the fourth season of "So You Think You Can Dance?" After a topsy-turvy intro in which each of the finalists got a few seconds to show off their moves (Dramamine, anyone?), host Cat Deeley laid out the process: the top 20 will be split into 10 couples and each week they'll pick their dance styles randomly out of a hat. They'll perform and the voters pick their favorites