Complex sentence: He was given his first guitar by Kiss bassist Gene Simmons, and at the age of 13 went on tour as a guitarist with Cher; he appears as a guitarist in the music video for her song "If I Could Turn Back Time".
Split into simpler sentences: He was given his first guitar by Kiss bassist Gene Simmons, and at the age of 13 went on tour as a guitarist with Cher. He appears as a guitarist in the music video of a song called "If I Could Turn Back Time".