Well, apart from a passion for fashion and great sense of style (naturally), they have all signed up to climate change initiative 10:10 which you may have been seeing a lot of press attention about this week.
Yesterday thousands of individuals and organisations from across the country united behind one simple idea: a 10% cut in carbon emissions during 2010 - hence 10:10. Fashionista attended the big public launch and photocall at the Tate Modern yesterday. There was no sign of Viv unfortunately but Fashionista thought Hugh Fearnley-Whittingstall looked surprisingly dapper in a co-ordinated navy blue ensemble!
Fashionista readers can get involved themselves whether signing up on behalf of their organisation or as an individual or family. Tips and tricks for reducing your carbon emissions will be provided along the way so even if 10% sounds like a big ask initially you may be pleasantly surprised at how much you can achieve.
For more details go to the 10:10 site or see the dedicated microsite the Guardian has produced.