"Goin' Out of My Head" is one of the most performed and recorded pop standards to emerge from the 1960s. Written by the team of Terry Randazzo and Bobby Weinstein, it is a song of unlimited devotion sung by a person to someone whom he adores, but who doesn't know he exists. This is driving the singer crazy, as he proclaims over and over against soaring music that explodes with passion and torment, building to a repeated climax on the words "night and day, day and night." The song is intense, direct, and simple, but it also has one of the more memorable melodies of its time, and its rapid build from a quiet beginning to a volcanic ending is compelling and unforgettable. It was recorded initially by Little Anthony & the Imperials as their follow-up to another Randazzo/Weinstein song, "I'm on the Outside (Looking In)," which had been a Top 20 hit. That song, an attractive but conventional vocal group ballad, offered little advance warning of what was to come. "Goin' Out of My Head" gave tenor "Little" Anthony Gourdine a chance to show off the emotional qualities of his voice, his very lightness of tone adding to the song's import. The initial recording was a Top Ten hit, and the song began to attract cover versions immediately by both jazz and pop figures. In late 1967, the Lettermen released a cover of the song in a medley with "Can't Take My Eyes off You," a recent hit for Frankie Valli. The result was almost as big a hit as the first records of each song, and marked the first appearance of "Goin' Out of My Head" near the top of the easy listening charts. But the song received a final seal of approval in 1969 when Frank Sinatra recorded it for a single that made the pop and easy listening charts. So, "Goin' Out of My Head" had become a hit for the third separate time within five years -- a rare achievement. With that, it was established as the kind of pop classic that is timeless and ubiquitous, and it has never really left the public consciousness since, with hundreds of recordings and millions of plays on radio.