Humble Pie Pop

3rd July 1971: From left to right: Peter Frampton and Steve Marriott of the group, 'Humble Pie' at a free open-air pop concert in Hyde Park, London. (Photo by Central Press/Getty Images)

3rd July 1971: From left to right: Peter Frampton and Steve Marriott of the group, 'Humble Pie' at a free open-air pop concert in Hyde Park, London. (Photo by Central Press/Getty Images)