I used this sketch. with minor adjustments, and making it an A7 card: http://www.sketchandstashchallenge.blogspot.com/
The flowers and stickles have been in my stash a long time, and not well used! The image was recently given to my by a friend who is no longer stamping.
I used the cupcake photo for inspiration - the colors, sprinkles, arrow like decor - I have the words Happy birthday embossed on the bg, but kind of hid most of them!: http://birthdaysundaes.blogspot.com/