Poppy-red dress for my sister's wedding

Dear ESB,

My sister is getting married in August, and I honestly could not be even an ounce happier than I am for her and her future hubby. She asked me to be her MOH, and I truly feel like it is just that -- a huge honor to be asked. I have helped the two of them plan a really fun, creative and seemingly rustic (though trust me, nothing will be left to chance) wedding. We have her dress, her wedding-and-honeymoon-undies, flowers, food, music, bouncy castle -- the works. Pretty much the only thing left missing now is something for me to wear. Since they also asked me to sing at the wedding, hoping nobody will notice the girl in the jersey beach-dress from 3 years ago isn't really an option. Poo.

Being the rocking bride she is, my sister changed her already loose dress-instructions for me and the other 5 bridesmaids of "everyone can wear a different dress, as long as it is red, yellow or orange" (the wedding-colors) to "wear whatever the heck you want, you are all gorgeous and will look amazing." She rocks, I know. However, I still want to wear red. I have been sporadically scanning through shops and the internet for more than half a year now, and have not found anything I really loved yet. And now I am starting to get nervous. I know I theoretically still have time, but what if I suddenly realize it is 2 weeks to the wedding and I don't have anything to wear? That would be so typical. I do have this beautiful light yellow BHLDN dress with a keyhole back detail, but I wore it to two weddings last year and also, and maybe this is just the wedding-adrenaline talking, I sort of feel like I should try to wear the popping-est (it's a thing.) of the wedding colors. And I just feel like buying a pretty new red dress.

I would like something poppy-red, maybe lace, more like a summer dress than a gown though, since it really is going to be more of a fun garden wedding with games and before-mentioned bouncy castles. My sister's wedding dress has a bateau-neckline, and she has said that she wouldn't mind but actually even like the symmetry if my dress had the same. I have a curvy but nice figure, bit more busty (DD) and hippy (31), but I do like my waist.

I really hate turning the attention from the brides to a MOH, but I really am getting a little flustered -- I've just been spending much more time planning the wedding itself, and it's looking to be so perfect that I would hate to fall out of pattern, though my sis will look so stunning, maybe nobody would notice after all... But we better not risk it -- I would really appreciate some help!

Thanks so much,
DressingWoes

*****

MOH of the millenium. Holy shit.

What you really need is this. (Anyone seen similar for not-$680?)