If ever there was a reason to dress up in diamonds and hit the red carpet, this was it: Cartier’s 100th anniversary party in New York! Held at Cartier’s 5th Avenue Mansion in New York City, the event celebrated the luxury brand’s long time presence in the United States, as well as their ongoing support of charities. An historic display of 100 one-of-a-kind Cartier creations, was unveiled at the party, and will remain as an exhibit in the store until May 21.

Cartier has a long history of dressing celebrities, and has long been synonymous with glamour. So of course, there was no shortage of celebrities on hand to ‘ring’ in the festivities. Demi Moore, a frequent patron of Cartier jewels on the red carpet, wore diamond hoop earrings, 2 diamond bracelets and a black enamel and diamond floral cocktail ring. Asked what her favorite piece of Cartier jewelry was though, and she pointed to her 1937 Cartier engagement/wedding band. She said: “I have quite a few, but that would be my favorite!” Demi Moore looked stunning in Cartier and her Prabal Gurung cocktail dress.

Also at the event and seen here with Demi Moore, was Kate Hudson. Often known for her hippy style and free flowing gowns, she looked all together glamorous on the Cartier red carpet. Wearing a Rachel Roy black cut out evening gown, Kate finished her look with a $905,000 diamond and onyx panther necklace and a $230,000 diamond cocktail ring. She gives new meaning to “looking like a million dollars!”

This truly was a diamond studded celebration with other celebs such as Elton John, Rachel Weisz, Eva Mendes and Justin Timberlake on hand. We may be at the tail end of a recession, but this was one Bling-tastic party, indeed!

If you could borrow any piece of jewelry to attend a party, what would you choose? Necklace? Bracelets?