Three things about this movie
1) During the final chorus of "Grand Night for Singing" when Dick Haymes is singing, there is a guy dancing behind Vivian Blaine who is making goofy faces whenever he's facing the camera.
2) There is an extra that I noticed in a couple of scenes who looks like Betty Jaynes (she played Mickey Ronney's sister in "Babes In Arms"). I noticed her standing behind Vivian Blaine and Dick Haymes during "Isn't It Kinda Fun?", and also briefly towards the end of "All I Owe Ioway." Probably not her, but there is a striking resemblence.
3) Did Abel Frake really win the bet? Wayne had his heart broken at the fair. Seems to me that should count in Dave Miller's favor. Funny how the screenwriters just glossed right over that.