I think I might try this instead of an over the top cake this year.
Microphone cupcakes - super cute idea for a rockstar party. Not sure if it would work, but if you could use aersol coloring like used for cake decorating to make the cones silver or some other color. That would be extra cute!
Omg. THIS is how to do the microphone cupcakes lol!
Photo 15 of 17: Rock Star Guitar / Birthday "Rock Star Birthday" | Catch My Party
How To Make Karaoke Microphone Cupcakes! Where do I get these mini ice cream cones?
Rockstar Cupcakes @Jenny Johnson
For a Kids Rock Star Party...Microphone Cupcakes!
Rock Star Birthday party microphones!