Rocker John refers to the English singer, songwriter, pianist, and composer Elton John. He has sold more than 300 million records, making him one of the best-selling music artists of all time. Elton John has been a major figure in popular music for over five decades, and is known for his flamboyant stage costumes and glasses. He has had numerous hits, including 'Your Song', 'Crocodile Rock', 'Candle in the Wind', and 'Rocket Man'. He has also composed music for films, including The Lion King.