my biggest prob with the outfit is that the material is thick and the color is orange. I hate orange. blah. I'll try to post a pic, but i can't yet, i don't have 25 posts.
you don't like orange? i think it's such a great mehendi color! i'm tired of girls wearing green, and yellow is great and all, but orange really looks good on our skin (any shade of brown). but, you should definitely wear what you want to wear. i'm sure they'll understand though. even if they went through a lot of work, i'm sure they'd want you to be happy and feel pretty in whatever you're wearing.
oh, and regarding peshwaas...i've seen a bunch of people wearing cropped pants with them? i think churidaar's make them more traditional (which i prefer) but cropped pants seem to be in too?