White Christmas movie- Sinatra cameo

Could've sworn we saw Frank Sinatra in a quick cameo shot, he was putting a record on backstage in the film "White Christmas". Since another website said he was the other financial backer of the film with Crosby, and also a good friend of Rosemary Clooney, it would not be a stretch to see that he was in a 2 second clip of the movie. Has anyone else noticed this shot?