I Am In A Fashion Crisis!!!!!

I *forgot* that I have a black-tie dinner to attend next Saturday.....ALL my ewvening clothes are size 6, 8 or 10

I tried things on, but I look like 10 lbs. of poop in a 5 lb. bag.....

(at this point I'm lucky to be a 12).....
I'm thinking this (since I don't want to spend a lot of $$ on "big" clothes) I have a raspberry colored tank with a matching satin cropped jacket with rhinestone buttons and frnech cuffs (which will call attention to my skinny wrists...

)...I will buy a solid black hankerchief skirt or asymetrical hem in a body-skimming (not tight) fabric....I'll be hunting the Burlington Coat factory or TJ Maxx this weekend...... do you think this would work? I'm about 5'5" and my thighs are currently 21.25....not too bad, I've got nice heels to jack my butt up....but I don't want to look ridicules.....
what a WASTE.....I have such beautiful EXPENSIVE clothes I ate my way out of......if I don't get back into them I may consider having my mouth glued shut. grrrrrr!