hello! would love any ideas on a cake for a hair dresser. my sister has just graduated from school.i want it to look not like a sheet cake with writing. any good ideas would be great! thanks!

Of course.....a blow dryer! Make a rounded round or oval w/some cupcakes cut in 1/2 to fashion the barrel.
A hairbrush; comb; or a head (wonder mold)w/curlers in it.

If you don't have/want to get the wondermold, use a big cupcake for a mini head on top of a base cake (round, sq, sheet whatever).