Defying Gravity' is one of the most famous songs from the musical Wicked. It is performed by the character Elphaba, also known as the Wicked Witch of the West. The song comes at a pivotal moment in the story. Elphaba decides to embrace her true self and stand up for what she believes in. The lyrics express her desire to break free from limits and expectations. The song is powerful and full of emotion, with soaring high notes. It has become a symbol of empowerment and individuality. Many fans consider it a highlight of the musical.