Birthday (Association album)

The song "MacArthur Park", which was first recorded by Richard Harris, was originally offered to the Association for inclusion on this album. Producer Bones Howes challenged Jimmy Webb to write a pop song that incorporated classical instrumentation and an odd time signature, which he planned to have the Association record.

According to rumors, the song was intended as a centerpiece for a twenty-four-minute cantata that would occupy one side of the record, but the group rejected the idea and were only interested (albeit reluctantly) in recording the “MacArthur Park” section. This rumor was later debunked by Webb himself, claiming there was only one composition. The reason for its exclusion was that the group, being able songwriters themselves, were not willing to give up two to three of their songs for the sake of Webb's project.

When Harris, who had just performed a slew of musical numbers for the film adaptation of Camelot, contacted Webb for a possible collaboration, this was among the compositions that were in consideration. The Harris recording became lead single for his pop record debut, A Tramp Shining, and made its way onto the Billboard Hot 100 at number 79 on May 11, 1968, peaking at number 2 on June 22, 1968 behind Herb Alpert's "This Guy's in Love with You".