Big Bird and Elmo have a special “2 friends” song to sing, but when Abby wants to join in, they have to turn their 2 song into a 3 song. Can the Three Little Pigs help them out? Also in this episode: Charles Gibson wants to explain the word “predicament,” but he can’t find his glasses. Country music duo Sugarland sings “Songs” with Elmo. Brought to you by the letter T and the number 3.