50. 'Gimme Shelter' — The Rolling Stones
For a song that Keith Richards wrote in 20 minutes, "Gimme Shelter" made a big impression. The opening track to the 1969 Rolling Stones album "Let It Bleed," it was never released as a single but has been included in many compilation records and has been a staple of the band's live gigs. During their 50th anniversary tour in 2012, the Rolling Stones sang this song with Lady Gaga, Mary J. Blige and Florence Welch.