At Fillmore East June 27, the Fillmore East closed, and the band were invited to play a final, invitation-only concert, along with Edgar Winter, the Beach Boys and Country Joe McDonald. The Beach Boys initially refused to perform unless they headlined the event, but Graham refused, telling them that the Allman Brothers would be closing the show, and they were free to leave if they disagreed. The Allman Brothers' performance was used for additional tracks when an expanded version of "At Fillmore East", "The Fillmore Concerts", was reissued on CD. "At Fillmore East" showcases the band's eclectic mixture of blues, rock, country, and
Humble Pie was released to coincide with the album and failed to chart, however the band was becoming known for popular live rock shows in the US. On July 9, 1971, Humble Pie opened for Grand Funk Railroad at their historical Shea Stadium concert, an event that broke the Beatles record for fastest selling stadium concert, to that date. Also in 1971 Humble Pie released their most successful record to date "Rock On" as well as a live album recorded at the Fillmore East in New York entitled "Performance Rockin' the Fillmore". The live album reached No. 21 on the US "Billboard"