Rocker Billy is a musician who has achieved great success in the music industry. His real name is William Martin Joel, and he is best known for his hit single 'Uptown Girl'. He is also an accomplished pianist and singer-songwriter, having released several albums throughout his career. The crossword solutions for Rocker Billy are OCEAN (5 letters), IDOL (4 letters), and JOEL (4 letters). OCEAN refers to his 1983 album An Innocent Man, IDOL is a reference to his status as a pop culture icon, and JOEL is his last name.