This is my Mum, clowning around with a toy guitar. Caption written on the back of the photo is "The Fifth Beatle Winter 1964-65". Pretty sure I took this photo, as I remember the day. My Mum had a great sense of fun, and loved having her photo posted online, so I'm pretty sure she's smiling down at me right now :)
(Previous posts on this day have been of an actual rock, and Rock Hudson movies. I still don't have any rock in my music collection, but I suddenly remembered this old photo!)