The Beatles

For anyone unfamiliar with The Beatles, here is one of their most well known songs, "Hey Jude."

From Left to Right: George Harrison, John Lennon, Ringo Starr, Paul McCartney

If you are curious about the song, please take a quick read through the wikipedia entry:

Hey Jude

If you would like to learn more about The Beatles, I would recommend reading through either of these websites:
Wikipedia on The Beatles
Allmusic Guide on The Beatles