|From the episode:||Peter's Two Dads|
"Sixteen Going on Seventeen" is a show tune from the 1959 Rodgers and Hammerstein musical The Sound of Music and the 1965 film of the same name. In both, the song is about Liesl, portrayed by Charmian Carr, and sung by her and Maria von Trapp, played by Julie Andrews.
In "Peter's Two Dads", Lois Griffin sings the song at her daughter Meg's 16th birthday, clueless as to how old Meg is. Trying to get her to say how old she is, Lois purposely fumbles through her rendition.
Lois: You are huh huh
Going on huh huh
Fellas will fall in line...