The two-time Mirrorball Trophy winner joined Derek Hough, Carrie Ann Inaba, and Bruno Tonioli as a guest judge for Halloween ...

"Halloween Night" featured makeovers, spirited routines and a dance marathon where couples had to bop 'til they dropped ...

Carrie Ann's comments: "Even though you're on top, I still want you to enjoy the process," but "you were wonderful." Derek's ...