I think The Beatles have been influential on the music world, but I don't know how they became such icons.
They formed the English rock band in Liverpool in 1960 and became very popular in 1963.
What was their first album?
Their first hit was "Love Me Do" in 1962, but I'm not sure of the name of the album. 
Oh, I can hear that song in my head, now!  I had friends post a picture of themselves on Abbey Road.  Wasn't that an album of theirs?
Yes!  I went there when I was in London.  Beatlemania was definitely a big deal in 1963 when their popularity emerged.  Screaming girls everywhere.