returns Monday for the season 30 finale! ET will be following along throughout the two-hour spectacular to break down all the best performances and the most surprising moments.The competition has reached fever pitch with the final four remaining couples getting ready to duke it out on the dance floor in the race for the coveted mirrorball trophy.As the couples dance their hearts out with their last routines of the season, judges Carrie Ann Inaba, Len Goodman, Bruno Tonioli and guest judge