I treated myself to a teeny microphone mould and used black sugarpaste to make the little things. When they were dry, I dusted the top with some pearl lustre dust and varnished the bottom half. These were mega fiddly but looked very cool in the end.
These cupcakes were made with this incredible stuff.
On top i swirled some vanilla buttercream and sprinkles before adding the microphones.
OH and I printed out little 'happy birthday's and stuck them to cocktails sticks!