Reality television personality and professional choreographer Abby Lee Miller of "Dance Moms" joins as a guest judge alongside Len Goodman, Bruno Tonioli and Carrie Ann Inaba on "Dancing with the Stars" . No stranger to the world of competitive dancing, Abby will bring a unique perspective and surely won't hold back from articulating while seated at the judge's table. The anticipated quarter finals begin as Pro Mark Ballas makes his solo recording artist debut singing his new single "Get My Name," along with his band and the house band "Ray Chew Live." Then, the remaining couples will perform an individual dance and the first ever "Celebrity Dance Duel.".