In high school, my AIM username was "lenntwistle": a combination of John Lennon and John Entwistle. (I thought I was sooooooo clever. Too bad I had to explain it every time I had a conversation with someone [although let's be honest, the only people I chatted with were band kids who were just as nerdy—but not as classic rock-savvy—as me.])
Anyway, the only reason I bring it up is because it's October 9, one of my favorite self-proclaimed holidays. JOHN DAY! i.e. the day that John Lennon and John Entwistle were born, 1940 and 1944 respectively.
In honor of these guys, here they are with their respective bands, ripping their vocal cords to shreds singing "Twist & Shout":
https://www.youtube.com/watch?v=ohql4weWrqk
https://www.youtube.com/watch?v=k2Ls5L8DWFk
Happy birthday, John and John!