I'm always interested in what Tilda Swinton or Kate Blanchette are wearing, and Emma Thompson, Signourney Weaver, Renee Russo, and Sophie Wessex - since they are my age +/- 5 years. I'm intrigued by the style of Charlene of Monaco and Meghan DOS since they deal with some of the same body issues (broad shoulders, short waist) that I deal with.
Honestly, I haven't watched much TV the last five years, so I'm out of the loop there, and my favourite magazines (More, Instyle UK, Stylewatch) are no longer in print. The only one of the 'younger set' that stands out for me is Emma Stone.