http://www.youtube.com/watch?v=iH2a30LTeWw
At the beginning of the film when the opening credits start, there is a voice and music. The cartoon character in the scene who is supposed to be Danny, turns up the radio and you figure out its a DJ and song being played so this makes it a diegetic sound. As the scene goes on, it changes into a non-diegetic sound.
http://www.youtube.com/watch?v=HsYC-hVEpQM
In the scene where Danny is racing, the background music is non-diegetic. However the diegetic sounds are the cars engines and the characters cheering and talking.
http://www.youtube.com/watch?v=0pyA6jAM3_I
In the very last scene which is where they're all singing in the theme park, there is a mixture of both diegetic and non-diegetic sounds. The clapping is pre-recorded, its relevant but you can't see it. You don't see where the music is coming from you can just see the characters singing.
