 The Beatles are iconic for many reasons, including the bowl cuts they possessed early in their career. Throughout the bands tenure, their hairstyles would differ significantly, with John Lennon developing long hair and George Harrison rocking a beard. During the Sgt. Peppers era of The Beatles, Paul McCartney had a noticeable mustache that he grew ... Why Paul McCartney Had a Mustache During the Sgt. Peppers Era... 