Scott McKenzie, center, with the members of The Mamas and the Papas in 1967. John Phillips, far right, wrote San Francisco (Be Sure to Wear Flowers in Your Hair). McKenzie died Saturday. Worth/AP hide caption itoggle caption Worth/AP The Two-Way Scott McKenzie, Who Sang 'San Francisco' In The Summer Of Love, Dies August 20, 2012 The gentle song became a hit and captured the spirit of what was happening in San Francisco that year. McKenzie was 73.