True Soft Power - Hollywood, and associated media industry, which happens to be the platform through which "Russian ballet, Japanese manga, k-pop", etc. reach people.

With the Internet and some competing heavy-weights, it may no longer be an US soft superpower it was before, but it still retains its important quality: it's ubiquitous, ever-present, and so enormous it's hard to notice - much like fish don't think much about the water they swim in.

and dont forget the pandas