Don't know if this has been covered but didn't this movie have a different ending where Kelly remains a heel to the very end(and maybe Judy ends up with Murphy?) but it didn't play well in previews so they had to change the ending?
And then after being sensational in this movie MGM doesn't know what to do with Kelly so he and Donen have to go to Columbia and make their MGM musical there with a sidetrack to a Siodmak film noir with Garland's frenemy Deanna Durbin who tells Hollywood to go to hell and outlives everybody...