Wedding Files 2 : What will I wear to my brother's engagement??

Ooh I am so super confused! I have a list of things that the lehenga should make me look like :

a) Royal
b) Newly Wed
c) NOT fat
d) Responsible elder Nand (although my brother is elder than me, because I got married first and my bhabhi is younger I am now older....does that make sense?!)
e) Should look WOW without looking too wow (so as not to over shadow my bhabhi's lehenga, which I am sure it won't my bhabhi's lehenga is totally wow!, but should be 'wow' enough so that it doesn't blend in with other sister's lehenga's :/ )
f) Should be re-usable for another relatives wedding.


So far I loved this stiff brocade lehenga which made me look 'responsible-elder-nand' but my mom says its not flattering :'(

I also saw a velvet lehenga which I thought might make me look fat but surprisingly it doesn't, I kind of look good in it, but I am not 100% convinced.

I want my look to be some what like this :



I am bent towards blue this time, because no one let me wear blue on my wedding :'(

Any suggestions?