From Mario Lopez and Karina Smirnoff to Derek Hough and Shannon Elizabeth, Dancing With the Stars has always been a place for single stars to strike up a romance with their professional dance partners. But the newly announced cast of the hit ABC show will test the limits of three —yes, 3 — already established couples.First, country superstar Jewel and her rodeo champ husband Ty Murray will face off in the competition. Then, show pro Karina will try to out-mentor her own fiancé, Maksim Chmerkovskiy. The one current couple who won't be trying to one-up their better half is made up of pro ... Read More >>