Help finding Black and White Episode?

Stick with me here. I clearly remember an episode of what I'm assuming was animaniacs where Dot goes on a search for some missing female hollywood movie star who was also an animaniac? It was in black and white or at least parts of it, and it was very somber and a little dark from what I recall. The character may not have been missing per se but maybe left the business and vanished? Maybe it wasn't animaniacs and was something like Tiny Toons, but I swore it was Animaniacs. Maybe I'm making up the black and white part, I don't know. But this was one of my favorite episodes as a kid and if anyone has any info on what I'm remembering it would be really appreciated. Thanks so much