Episode 4607 - The Best Friend Band HBO Premiere: Saturday February 20, 2016 PBS Premiere: Monday December 5, 2016 Elmo and Abby learn how to compromise and combine their two favorite songs, creating the Best Friend Song. Also featuring "That's Music" song with 5th Harmony, Murray Has a Little Lamb-Music School and Elmo's World-Violins. Brought to you by the letter M and the number 5. This episode features an all-new street story. If you saw "The Best Friend Band" please like this post and share your thoughts below.