An unforeseen illness sidelined Cheryl Burke from kicking off the Dancing With the Stars tour Tuesday night in Seattle. The professional ballroom dancer told TV Guide, "During the run-through, I was cramping and in pain. I couldn't even stand up straight." After a visit to a nearby hospital, Cheryl returned with the news that she has a possible case of appendicitis. Fans will have to wait to see if Cheryl can rejoin the cast for its 37-city tour after she hears back from her family doctor she visited earlier today in San Francisco.