Worst musical (in your opinion)

I can't remember the title of it, or the plot of it (all I remember is someone at some point held a newspaper with a WW2-related headline on it featuring a certain offensive 3-letter word of the period), but the worst I've seen was a really shallow 20th Century Fox musical from the 1940s. Carmen Miranda appeared in it, and though she was given a bigger role than usual, that doesn't mean it was a better showcase for her talents. I realise musicals are meant to be light entertainment, but even so, there has to be at least a small amount of substance in it. This film had about as much substance as a bubble. The fact I've forgotten nearly everything about it despite watching it only a few years ago should tell you something.