Here is a complete screenmatched USO vaudeville show girl from CAPTAIN AMERICA: THE FIRST AVENGER.
I was able to identify the actress on screen based on the handwritten labels inside the costume. Given there wasn't any stunt double work required for these sequences, and the unique handstitched placement of the stars on the lapels (every costume has slightly different placement) I am confident this is the one you see her wearing on screen.
Marvel only released 6 of these costumes, 3 with sequined lapels, and 3 with the standard non sequined star lapels. This is 1 of 3 with the standard star lapels.
Also comes with her silver dancing shoes.
More from Captain America: The First Avenger (2011)