After divorcing his first wife, John Lennon made no secret of his feelings for Yoko Ono, both in his solo career and his Beatles' days. Lennon referred to his wife directly ("The Ballad of John and Yoko," "Oh Yoko," "Dear Yoko"), but oftentimes indirectly ("Don't Let Me Down," "I Want You (She's So Heavy)," "Happiness is a Warm Gun").