Derek and Garth performed the Viennese Waltz, earning 25 points from the judges. During the second round they upped their total score with a fiesty rumba, earning them 28 points which was their highest score at that time.
Derek is hoping to beat his sister and take the championship this year.
"For me, it's more of a, hey, you've won already, give me a chance, girl," he said. (ABC)