Most musical movie continuity mistakes of 1964

1Mary Poppins pictureMary Poppins (1964)33
2My Fair Lady pictureMy Fair Lady (1964)23
3Viva Las Vegas pictureViva Las Vegas (1964)2
4Rudolph, the Red-Nosed Reindeer pictureRudolph, the Red-Nosed Reindeer (1964)1
5The Unsinkable Molly Brown pictureThe Unsinkable Molly Brown (1964)1
6Kissin' Cousins pictureKissin' Cousins (1964)1
7Robin and the 7 Hoods pictureRobin and the 7 Hoods (1964)1