Have you got grand final fever? It's definitely the hottest fever going round town and everyone's hankering for a piece of the pie. Tonight, the countdown heats up to discovering who will be Australia's favourite dancer. From thousands to just four – and these guys have sure been put through their paces this week! Each dancing a duo with each other as well as a group routines - let's find out how the Fantastic Four fared. Kicking off the show with a supersexy Cha-Cha - choreographed by the master of Ballroom, Mr. Jason Gilkison - were the always lovable Demi and Jack. Burning up the dancefloor in a shimmery white dress that showed off her lean, mean, dancing bod machine, this routine had the saucy Demi teasing partner Jack all over the stage, even ending up on the judges' podium! This wonderful routine had the judges in agreeance – the wow-factor was sky-high. Matt said they did such a great job and unlike last time they danced a Ballroom style (the Rumba), this time he really bought the connection between both of them. Bonnie commented that the opening was particularly sexy. She said that Demi could achieve anything and Jack was just sensational. It was a routine where two people became one. Jason said the Cha Cha, developed in the ‘50s, is a dance of joy so both performers fulfilled for him what the Cha Cha is all about. He commented on Jack's mastery of the Ballroom stance; the feel and look, and that Demi eats it up with her face. All up, a fantastic way to kick off the show! Attention! Hup, hup!! Kate and Rhys are next onstage, decked out as identical English National Guards for a unison-heavy routine from Supple. "My intent was to show there's a human side to people like policeman as well," he says. "It starts with a military drill, then they funk it up, then it finishes with a military drill. It's sort of like that scene in Police Academy where the main one sneaks out to go out partying, and comes back in the next morning." Matt said was a very, v