The musical sequence in (500) Days of Summer also reflects how Tom’s perception—influenced and defend by other movies—shapes the viewer’s interpretation of the story. After his and Summer’s first sexual encounter, Tom walks down the street as “You Make My Dreams” by Hall Oates plays seemingly non-diegetically. However, he begins to dance in beat to the song, again reflecting how he is at once a character in the film and a representation of the cinematic apparatus, as the soundtrack is at once non-diegetic and a part of the reality that he shapes in the film. As seen in the first shot above, several fountains shoot off euphemistically as Tom walks past.  Tom is in the foreground but the massive fountains that overwhelm the frame are clearly in focus, and the fact that a municipal construct explodes in tandem with his mood reveals the extent to which Tom’s perspective dictates what the viewer sees. After Tom walks past the fountains, he dances and random passers-by join in as a choreographed dance sequence ensues. Tom takes a baseball bat and pretends to hit a home-run—an obvious reference to “scoring” and going through all the “bases,” which are common terms used in reference to sexual intercourse—which makes the others, who are now dancers in his musical number, pick him up and cheer.Â
The heavily stylized sequence shows that Tom does not perceive what might be called “the real world,” but rather a reality of film history wherein spontaneous dance sequences are normal. Whereas Patricia White speculates that musicals turn narrative signs into clear fictional constructs and thus exist outside of ideology (120), (500) Days utilizes that transformation to reveal the ideological impacts of a male-dominated narrative. As a representative of what the cinematic apparatus constructs as normal, Tom finds no issue with strangers dancing with him in celebration of his sexual victory, despite the fact that the audience realizes how unrealistic this scene is. The viewer is meant to consider how Tom’s perspective is not at all natural, even if it seems so to him, and so we consider the ways that films and their naturalizing tools alter our perception of the real world.
Lest the sequence be deemed representative of stage musicals more so than movies, the end of this sequence makes it explicitly filmic. In the second shot above, an animated bird flies down onto Tom’s shoulder; the fantasy quality of the sequence is brought to nearly parodic levels, as the cartoon bird is entirely natural to Tom despite being far removed from what is an otherwise non-animated film. The bird’s presence and blue coloring—a color always associated with Summer—reveals Tom’s rule over what the viewer perceives as realit. Even the other dancers in the background wear predominantly blue colors, emphasizing the association of Tom’s bended perception to Summer. The fact that Tom’s biggest association with Summer appears to be the colors she wears also bespeaks his surface-level understanding of her, which is a direct result of his function as a cinematic apparatus: he sees the surface, but nothing underneath it, because he actively avoids granting Summer the status of a complex human being.