Episode 13 of Candy Crush Saga is called Cupcake Circus. There is a circus tent that has a cupcake at the very top of it. There is no other reference to cupcakes in this Episode.
There is a clown who works at the circus. The clown is balancing on a tightrope at the start of the Episode, explaining to the little girl character that the circus has run out of cotton candy. She, as usual, offers to help him with that problem.