Charmian Carr, best known for her role as Liesl in the film version of "The Sound of Music," died Saturday at the age of 73, her website and the Rodgers & Hammerstein Organization confirmed. Carr died of complications from a rare form of dementia, her family said. The actress sang one of the movie's classic songs, "Sixteen Going on Seventeen." Read more http://www.cnn.com/2016/09/18/us/liesl-sound-of-music-dies/index.html