The editor of fashion magazine Harper's Bazaar has told ITV News of L'Wren Scott's "great talent for friendship".
Justine Picardie said as well as being "an inspiration to many in the fashion industry", Scott was "a very dear friend to a number of people, myself included".
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Colo became a mother of three, grandmother of 16, great-grandmother of 12 and great-great-grandmother of three.
The district's director of homeland security has said officials are planning for 800,000 to 900,000 people to attend the ceremony.
The Supreme Court is set to decide on whether disabled travellers are legally entitled to have priority use of wheelchair spaces on buses.