That Dolce 'dress' is really not appropriate for a premiere, so I'm going with Beyonce. I mean, Blake might as well have worn a bikini tbh, especially in the middle of the winter in NY?
For the Lanvin dress, I'm going with Kim hands down. The dress just hangs on Michelle, Kim actually fills it out and gives it some shape. I'm also not usually the one for such characterizations but in this case it's too obvious to me.