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Leave a Tender Moment Alone, a song by Billy Joel, showcases the harmonica of Toots Thielemans. Thielemans' distinctive style and improvisational flair add a touch of jazz and blues to the song's introspective and emotional lyrics. His harmonica solos create a poignant and evocative atmosphere, perfectly complementing Joel's heartfelt vocals and the song's themes of love, loss, and the passage of time.