The annual event marked the opening of the Alexander McQueen: Savage Beauty exhibition and Sir Paul McCartney, Beyonce and Gwyneth Paltrow were among the guests.
Madonna spoke emotionally on the red carpet about McQueen, who committed suicide in February 2010 aged 40.
'I miss him terribly,' the singer said.
'Not only as a person but as a designer. I think the fashion business is a little bit dull without him and I loved his provocative punk rock attitude.'
'I think his designs were brilliant. I think he was brilliant. And I hope he's having fun wherever he is right now.'
Francois-Henri Pinault and his wife Salma Hayek served as the event's honorary chairmen, with Colin Firth, Stella McCartney and Anna Wintour as vice chairmen.
Other stars who walked the red carpet included Jennifer Lopez, Penelope Cruz, Jessica Alba and Taylor Swift.
From Sky News Via Yahoo! News UK