Ladies, I need help! The order calls for a 1/2 sheet layered cake, decorated in the colors mentioned. It's for a girl turning 14. I suggested a 2 tiered round cake but nope, they want rectangular 1/2 sheet. Any ideas? I would certainly appreciate any help. Thanks!

Sheet birthday cakes from the CC galleries:

http://cakecentral.com/modules.php?name=gallery&meta=search&type=full&search=sheet&album=8&search_user=

Just find one you like and change the colors to the ones you need.

HTH

Brillante colour combo -
I did an aquamarine and purple cake not long ago for a female turning 21 -
Coloured cakes -

Can you ask what things she likes in life/hobbies/ - and go from there?

Bluehue.