over 700 guests , including superstars cara delevingne , suki waterhouse , mila kunis , elton john , rosie huntington-whiteley , anna wintour and the entire beckham brood , turned out to support their pal christopher at the london in los angeles event at griffith observatory .
so how does one man have so many a-list friends ? and how did he turn burberry into the world 's coolest brand , notching sales for the six months to april up to £ 1.42 bn .