So was it Bert Stern, then?
If so, then Stern was working quite a while before Lindy - even I was!
It also shows that the theme is a long-running one - multi-model 'portrait huddle' shots were known to Herb Ritts, Patrick Demarchelier, Lindbergh and, I think, Sante D'Orazio amongst others that come to mind. I think Mark Selger also did that kind of thing. Lovely to have that access!
Rob