The AABA form is a common structure used in music, particularly in genres like jazz and popular music. It consists of four sections: the first A section presents a musical idea, the second A section repeats that idea, the B section introduces a contrasting theme, and the final A section returns to the original idea. This format creates a sense of familiarity and variation, making it appealing to listeners. In the AABA form, the A sections typically share the same melody and harmony, while the B section, often referred to as the "bridge," provides a different musical perspective. This structure allows composers to explore themes and emotions effectively, contributing to the overall narrative of the piece. Notable songs using AABA form include “Somewhere Over the Rainbow” and “I Got Rhythm”.