The most watched dance show of 2012 is?

The most watched dance show of 2012 is Dancing With The Stars. The guest  contestants of The All-Star season were:

Pamela Anderson from season 10
Emmitt Smith winner of season 3
Kelly Monaco winner of season 1
Shawn Johnson winner of season 8
Melissa Rycroft from season 8
Joey Fatone from season 4
Drew Lachey winner of season 2
Bristol Palin from season 11 
Kirstie Alley from season 12
Helio Castroneves winner of season 5
Gilles Marini from   season 8 
Apolo Ohno winner of season 4