Dancing with Robert Irwin is cool, but being choreographed by Witney Carson may be even cooler. Before stepping into the Dancing With the Stars ballroom for the show's 20th Birthday Party episode, Xochitl Gomez explained why she was so excited to dance again. "Witney choreographed [the number] and so I'm not gonna lie, I was most excited to be dancing with Witney and having her teach me," Gomez, 19, told Entertainment Tonight on Tuesday, November 11. "I've just been such a big fan and her hair whips, her lines, her sharpness, her technicality is off the f***ing charts.