I can 't remember seeing him without notch lapels on a dinner jacket. It's Armani apparently so, like all movie stars who know nothing about clothes, he just accepts it.
I don't understand the fuss about Clooney's dress sense in the US. As much as I like his work, I never see him in anything other than a dark suit or jacket and a white shirt, sometimes open, sometimes with a black tie. Very little imagination involved.