Elton John and Mick Jagger are two of the most iconic figures in music. They are both members of the Rock and Roll Hall of Fame and have been inducted into the Songwriters Hall of Fame. Both have had successful solo careers, with Elton John having sold over 300 million records worldwide and Mick Jagger having released over 20 solo albums. The term 'SIRS' is an acronym for their knighthoods, with Elton John being knighted in 1998 and Mick Jagger being knighted in 2003.