It was the first part of the two-night finale on "So You Think You Can Dance?" and host Cat Deeley threw a curve ball at us from the start. In an effort to change things up -- and perhaps to stretch another episode into two hours! -- each of the remaining dancers would perform with every other dancer. That meant the two girls would dance with each other, as would the two guys. Suddenly, those rumors of Lance Bass pairing up with another dude on "Dancing with the Stars" dont seem so special, huh?During the introduction, there was no immediately mention of the reports that Twitch and Joshua were rushed to the hospital earlier in the week after suffering from dehydration during rehearsals. Guest judge Mandy Moore joined regulars Mary Murphy and Nigel Lythgoe and Cat got the action started quickly, introducing the first dance from Courtney and Twitch.