Sonakshi's look in promo vs actual wedding

I like Sonakshi's look in promo better than the picture posted by Erica.

In promo the blouse is shorter and in wedding blouse has long sleeves. Also the sari is different too.Why do they give her always long sleeves?

Also in one of the interviews Shaheer said that Dev will forget the troubling issue and will be happy in the wedding. Because he has promised best days for Sonakshi and if he is only sad then how can Sonakshi be happy. I am hoping we get see happy Dev and Sonakshi during wedding.