Yusuf Islam, commonly known by his stage names Cat Stevens, Yusuf, and Yusuf / Cat Stevens, is a British singer-songwriter and multi-instrumentalist. To date, Yusuf / Cat Stevens has sold over 100 million records and has over 2 billion streams. His musical style consists of folk, pop, rock, and, later in his career, Islamic music. Following two decades in which he only performed music which met strict religious standards, he returned to making secular music in 2006. He was inducted into the Rock and Roll Hall of Fame in 2014.