Elvis Presley fans believe that he is still alive at the time of the Home Alone tapings - despite his death in 1977. Check out this clip where Elvis fans, all over the world, beleive the man standing in the background behind Mrs. McCallister is indeed the king himself.
Angels with Filthy Souls
The film Angels with Filthy Souls is a fictional gangster movie that was made for the Home Alone film. They even made a sequel entitled Anegls with Even Filthier Souls - that film appeared in the Home Alone 2 sequel.