Amy Purdy and Derek Hough danced the Quickstep on the Dancing With the Stars semifinals (Season 18, Week 9).

In their video, Derek talked about how this is the first dance they've done where they really have to travel, which is a whole new kind of challenge. Amy decided to try dancing with her running legs instead. Apparently it makes a big difference. Derek seems to be having fun with it. Amy also got a call from her icon: Oprah. Amy was thrilled to find out Oprah has been voting for her. Oprah said she'll take them out to dinner if they win. Wow. That's really nice.

Amy looks great out there. She really flies across the floor. Nice outfit, too.

Bruno said he jaw was dropping on the desk. The lightness of touch, the variety of steps, the speed was incredible. Carrie Ann said this dance allowed her to show off her athleticism. It took her breath away. Len though this was her greatest challenge, technically, but it was light and great, though it could have used more body contact. Kenny Ortega likes her a lot.

Score: 39/40.

Dancing With the Stars airs on Mondays at 8 p.m. ET/PT on ABC.