Husbands Christmas party HELP

This past June my husband started his new job... Well Dec. 3 is his big "Penguin" themed (formal black and white) Christmas party.

I am freaking out a little for a few different reasons. One of them being i will be 24 days out from my scheduled c-section, HUGE I am sure..and i still want to look and feel great, well put together.

I searched the web and found these dresses. Do you think they are appropriate? What is your favorite one?

1)

http://m.jcpenney.com/maternity-elbow-sleeve-lace-dress-with-bow-belt/prod.jump?ppId=pp5006153360&deptId=dept20000013&urlState=%2Fg%2Fmaternity-size-dresses-women-black%2FN-bwo3xZ12zZ1z141crZb7Z1cgZ1cj&h1Data=maternity%20size%20dresses%20-%20women%20black

2)

http://www.target.com/p/maternity-elbow-sleeve-lace-belted-dress-black-macherie/-/A-51583257?regMode=REG&backLinkName=gift%20registry&backLinkUrl=%2Fgift-registry%2F&reg_type=baby&search_interface=protected

3)

http://www.target.com/p/-/A-51147863?regMode=REG&backLinkName=gift%20registry&backLinkUrl=%2Fgift-registry%2F&reg_type=baby&search_interface=protected

Thanks!!!