Leo Dan rose to fame in the 1960s and 1970s with his melodic voice and heartfelt lyrics. He is known for his romantic ballads, which often explore themes of love, heartbreak, and nostalgia. Some of his popular songs include "Te He Prometido," "Como Te Extraño Mi Amor," and "Mary es Mi Amor."

Over the years, Leo Dan has released numerous successful albums and singles, earning him a dedicated fan base and critical acclaim. He continues to be a popular figure in Latin music, known for his timeless music and his ability to connect with audiences through his songs.