While weekend two of Coachella kicked off in Palm Springs, the real place to be was Brooklyn, where Tiffany & Co. was hosting their annual high jewelry Blue Book Collection. The star-studded event, which drew the likes of Reese Witherspoon, Claire Danes, and Ruth Negga, took over the St. Ann's Warehouse, complete with a fully functioning carousel. It was the cap to a party-packed week, thanks to the overlapping of Tribeca Film Festival and gala season. But it wasn't all film premieres and black tie; several designers hosted parties of their own, including a cocktail to celebrate the finalists and announce the winners of the inaugural CFDA + Lexus Fashion Initiative, recognizing brands with a high standard of sustainability and social responsibility (the Grand Prize winner, Erin Isakov, was awarded $150,000, while the two runners-up, Maria Cornejo and Wing Yin Yau were each awarded $50,000.) For all of the party pictures that you missed, click through.

Claire Danes, Jennifer Hudson, Ruth Negga, Reese Witherspoon, and Haley Bennett attend the Tiffany & Co. 2017 Blue Book Collection Gala.

Jamie McCarthy

Dressed in their finest wares, the A-list attendees of the Tiffany & Co. 2017 Blue Book Collection Gala posed for a picture on the Tiffany blue red carpet.

Frederikke Sofie rides a carousel at the Tiffany & Co. 2017 Blue Book Collection Gala.

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Inside the event, model Frederikke Sofie took full advantage of the carousel.

Wing Yin Yau, Maria Cornejo, and Erin Isakov attend a cocktail to celebrate the finalists and announce the winners of the inaugural CFDA + Lexus Fashion Initiative.

Joe Schildhorn/BFA.com

CFDA + Lexus Fashion Initiative grand prize winner Erin Isakov, along with runner-ups Wing Yin Yau and Maria Cornejo, celebrated their wins.

Rashida Jones attends 1stdibs Celebrates: Edie Parker's Home Collection.

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Rashida Jones opted for a gilded look to fete pal Brett Heyman's new Edie Parker home collection.

Lucy Hale attends the ASPCA After Dark cocktail party.

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Lucy Hale found a four-legged friend to pose with while hosting the ASPCA After Dark cocktail party.

A$AP Bari attends The Standard and A$AP Bari: Celebrate VLONE.

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In Los Angeles, A$AP Bari teamed with The Standard to kick off a one day only VLONE pop-up shop.

Liv Tyler attends the opening of Belstaff’s flagship location in Tokyo.

Courtesy of Belstaff

Liv Tyler headed to Tokyo to help debut Belstaff's new flagship store.

Tanya Taylor and Steven Kolb celebrate the launch of Taylor's CFDA Retail Lab at Cadillac House.

Rob Berry/BFA.com

While Tanya Taylor feted a store of her own, within the CFDA Retail Lab at New York's Cadillac House.

Athena Calderone hosts a cocktail party for Fabiana Filippi.

Hunter Abrams/BFA.com

Athena Calderone got into the spirit of spring, hosting a cocktail party for Fabiana Filippi.

Jenna Lyons attends Public Art Fund's 40th Anniversary Benefit.

Max Lakner/BFA.com

And Jenna Lyons embraced the arts at the Public Art Fund 40th Anniversary Benefit.

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