Though the film is divided into separate sections, the stories are interwoven both in the direction, with a character from one story walking through another's scene, and in the editing, in montage cuts that juxtapose different narrative threads.

ECONOMIST: Mexican cinema

It occurs to me now what we are seeing increasingly in musicals are times when the narrative stops for what amounts to a montage that's set to music.

NPR: Do Movie Audiences Have a Tin Ear?