Even though she wo n't be able to compete at the Olympics this year , Johnson told Burnett she still plans to go to London to cheer on her teammates . ` Shawn Johnson won four Olympic medals and a season of `` Dancing with the Stars '' She is retiring at 20 because of recurring knee problems . The former Miss America has been on "Dancing With the Stars" since its debut in 2004.
Shawn Johnson won four Olympic medals and a season of `` Dancing with the Stars '' She is retiring at 20 because of recurring knee problems . The former Miss America has been on "Dancing With the Stars" since its debut in 2004.