The film in which Shirley Temple first sang what would become her signature song was released on 28 December 1934, when she was six years and eight months old. It was the thirteenth film in which she appeared, and the tenth that year, but it's described on Wikipedia as "the first feature film crafted specifically for Temple's talents and the first where her name appeared eponymously over the title."
Ignoring the superfluous use of the word 'eponymously', this presumably means that Bright Eyes was the first film in which the words "Shirley Temple in ... " appeared in the credits.
© Haydn Thompson 2019