- Alfonso Ribeiro (Self - Host)
- Julianne Hough (Self - Host)
- Derek Hough (Self - Judge)
- Carrie Ann Inaba (Self - Judge)
- Bruno Tonioli (Self - Judge)
Dancing with the Stars — S12E17
Episode: Week 9 - Performances
Air Date: 2011-05-16
Overview
In the semi-finals Chelsea, Kirstie, Ralph, Hines and their pro partners, will dance one unlearned ballroom and one unlearned latin dance to finally participate in the Cha Cha Cha Marathon, where the winner takes all the points.