Here's a little clip of Shirley singing "Be Optimistic" from the 1938 movie, Little Miss Broadway.
I LOVED Shirley Temple when I was a kid--I remember being so excited when I received a Shirley Temple doll for my birthday one year, and I had record albums of her songs from the movies--I knew (and still do!) all of the lyrics to the songs. I was especially fond of this one because of its message, and sometimes I'd dance all over the house, singing it when I was young. Goofy, I know, but what sweet memories!