Mrs. Vandebilt by Paul McCartney is a spirited, carefree song that captures the essence of living life freely without stress or worry. The upbeat and whimsical nature of the song complements its theme of escaping the pressures and anxieties of daily life. McCartney encourages listeners to disregard societal expectations and embrace a more relaxed and joyful existence. Key themes include freedom, joy, and nonconformity. One poignant moment in the song is the repeated phrase 'What's the use of worrying?', which acts as a mantra for letting go of unnecessary stress.