Who: Bill Clinton and daughter Chelsea, plus Gwyneth Paltrow, Princess Beatrice, Will.i.am and Apl.De.Ap
What: A Night Out with the Clinton Millennium Network. Hosted by Bill, the evening invited 'leaders and future leaders' to talk about global philanthropic opportunities - and then watch a surprise performance from Will.i.am.
Where: Under the railway arches near Waterloo station, which we presume is not as shady as it sounds.
Bonus info: Gwyneth branched out from her beloved Stella McCartney to wear Antonio Berardi last night. The ivory lace peplum top and tuxedo trousers are from the designer's Pre-Fall 2012 collection.
Are Gwynnie's blonde locks making you contemplate going a shade lighter for summer? Get inspired by our favourite blondes below: