D'you know that feeling you get, when an outfit is off but you can't really say anything because it is otherwise attractive and fashion-forward?
Well, look no further than what Rachel McAdams donned. It's a beautiful Emilio Pucci dress with the V-neck just a tad wide for my liking. Should take it in. Also, I think I see a hint of the shoulder pad actually showing through the fabric, looks like a sanitary pad.
Now, the coveted Balmain. As though to prove my point, there's actually the dress modelled for print, and Daria Werbowy on the red carpet for comparison. The one on the left is more taut around the chest area, while Daria's just "sits atop lazily".
People who've done it right are Kate Hudson (in Rachel Roy) and Emma Watson (in vintage Ossie Clark).
Or, if all else fails, take a cue from what Angelina Jolie had done with her BCBG Max Azria dress.