The Holiday

So I am watching The Holiday and there is one scene where she puts a cd into the cd player and is singing to the music. So since you can see where the sound is coming from and it is the sound that was actually recorded I guess that would be a direct diagetic* sound ? And I never had really noticed before but they really do honk the horn on cars when they pass one in a movie which is really weird... And I just used the word really three times in that sentence....