Mr. Magoo Christmas carol trivia: what's the link between the cartoon and Barbra Streisand?

The composers Bob Merrill and Jule Styne offered a song titled "People" for the score but the animation had already been completed and it was too late to include it. Instead they added it to the score of a Broadway musical they were writing called "Funny Girl", where it became the first of many hits for the star, Barbra Streisand.