If you thought Jessica Simpson held the title for rocking the worst maternity wear in fashion history -- closely followed by Kim Kardashian -- then you must not have been paying close attention to Coco ... who wore this, oh dear.  

   We love us some Coco ... but to be fair, we're not sure we'd dig this dress on anyone -- let alone a pregnant woman. 

   Girl, stick to decking out your bump ... not letting your bump deck you in the head so hard that it impairs your judgement to the point of choosing this.