He arrived at the party 'fashionably' late. [=he arrived at the party slightly late, which is the fashionable thing to do]
She wore a sleek black dress and 'fashionable' [='stylish'] shoes.
It isn't 'fashionable' to express such an opinion these days.
(..) - What's necessary, my friend. I will tell him you saved his life. Master Wayne, you've been gone a long time. - Yes, I have. - You look very fashionable. Apart from the mud. Are you coming back to Gotham for long, sir? As long as it takes. I want to show the people... (..)2005 Batman Begins