Cat Stevens is the former stage name of Steven Demetre Georgiou (born in London on 21 July 1948). He is a British singer-songwriter, multi-instrumentalist, humanitarian and education philanthropist. In December 1977, Stevens converted to Islam and adopted the name Yusuf Islam the following year. He began releasing music as Yusuf in 2006.
These are photos from concerts where Cat Stevens played, so they may be of other bands that played the concert as well.