Sir Michael Philip Jagger is an English musician. He is best known as the lead singer and one of the founder members of the Rolling Stones. Jagger has co-written most of the band's songs with lead guitarist Keith Richards; their songwriting partnership is one of the most successful in rock music history. His career has spanned over six decades, and he has been widely described as one of the most popular and influential front men in the history of rock music. His distinctive voice and energetic live performances, along with Richards' guitar style, have been the Rolling Stones' trademark throughout the band's career. Early in his career, Jagger gained notoriety for his romantic involvements and illicit drug use, and has often been portrayed as a countercultural figure.