Barney engages a lively studio audience of youngsters with a countdown of his 20 favourite songs. What tune will claim the No. 1 spot? Will it be Barney's famed anthem "I Love You" or that old mathematical-footwear favourite "One, Two, Buckle My Shoe"? Other contenders include "Good Manners," "The Elephant Song," "The Doctor Is a Friend of Mine," "If I Lived under the Sea" and "Mr. Knickerbocker."