Seth Justman is an American musician, songwriter, and producer, best known as a founding member of the rock band J. Geils Band, formed in 1967. The band is celebrated for its energetic blend of rock, blues, and soul, often characterized by Justman's dynamic keyboard work and songwriting skills. Justman served as the band's keyboardist and primary songwriter, contributing to many of their most notable hits, including "Centerfold" and "Freeze-Frame." These tracks, from their 1981 album *Freeze-Frame*, achieved commercial success, with "Centerfold" reaching number one on the Billboard Hot 100. The J. Geils Band was influential in the late 1970s and early 1980s rock scene, known for their lively performances and the fusion of various musical styles. Their work helped pave the way for the popularity of rock bands that incorporated elements of R&B and blues into their sound. After the band disbanded in the 1980s, Justman continued to work in music, producing and writing for other artists. His contributions to the rock genre and the evolution of the band's sound have left a lasting impact on American music.