Question: What year did the American dancer and choreographer, who was a guest judge on the American televised dance competition show that premiered on July 20, 2005 with over ten million viewers and ended the summer season as the top-rated show on television, win an award for Outstanding Choreography?
Sentence (from "Big Brother 6 (U.S.)"): Though the finale had a total of ten million viewers, the series averaged 7.24 million viewers, a series low at the time.
Relevant evidence: No