In 'Legendary Lovers,' Katy Perry explores the concept of an epic romance that transcends time and space. The song delves into the idea of a love so powerful that it becomes the stuff of legends. Key themes include passion, destiny, and timeless connection, with references to myths and historical love stories to underscore the eternal nature of this profound bond. One particularly poignant moment is when Perry sings about the universe confirming their love, suggesting a cosmic approval that elevates their relationship to a mythic level.