Thanks to Cupcakes Take the Cake, for pointing this one out. These are from Bitsy's Cupcakery of Leicester, UK, via their Twitter account. They are meant to celebrate the UK's Summer Sundae Music Festival.
Here the description tells us that Billy Bragg is wishing Woody Guthrie a happy 100th birthday. Woody would have been 100 on July 14th of this year.
Here is the beaming Bitsy herself, as she stands next to the one and only (and oh so, handsome) Billy Bragg.