It Should Happen To You 1954

About 57 minutes in Judy Holliday is at home getting ready to go out. it looks like she has got most of a dress on there is a top bit to be added, the garment comes up too high to be a skirt. In the 16 seconds or so before the dress is complete the top of Ms Holliday's black fullslip is in full view; there is some very attractive white lace adorning the bust and shoestring straps.
About 73 minutes in Judy Holliday is backstage being helped out of one costume and into another. This allows for about 21 seconds in a fairly short black fullslip with a very deep lace hem and generous lace at the bust. The new dress is a bit off the shoulder and tends to make the viewer wonder where the slip's shoestring straps went.

The accompanying photo of Judy in the 2nd slip isn't a still from the film which I think makes it a publicity shot. I would infer that letting cinema goers know they would get to see Ms Holliday in this rather fetching slip would have been seen as a way of boosting ticket sales. Those were the days.