Willie Nelson performs for Miranda Kerr, Orlando Bloom, Emmy Rossum and more at Global Green USA's Pre-Oscar bash; Jennifer Lawrence, Bradley Cooper, Amanda Seyfried, Anne Hathaway and many more notables attend two separate Vanity Fair Campaign Hollywood events at Chateau Marmont and Eveleigh; Jessica Chastain, David O. Russell and others attend TheWrap's annual pre-Oscar party; David Arquette, Kate Upton, and Topher Grace are among the guests at The Art Of Elysium's Pieces Of Heaven Auction—get caught up on Wednesday's top L.A. events in this installment of Last Night's Parties.

Avalon Vanity Fair Graydon Carter Amanda Seyfried Emmy Rossum Anne Hathaway Harvey Weinstein Isla Fisher Sophia Bush Johnny Knoxville Chateau Marmont Diane Warren Cameron Silver Bradley Cooper david arquette Orlando Bloom Sacha Baron Cohen Buzz Aldrin Miranda Kerr Catt Sadler Jennifer Missoni Dylan McDermott Luke Perry Adrian Brody sebastian copeland Kathryn Bigelow Eddie Redmayne Topher Grace Four Seasons Beverly Hills Shaun Robinson Jerry Ferrara Krista Smith Piers Morgan Jane Seymour barbara boxer Helen Hunt Willie Nelson Ed O'Neill Jessica Chastain Judy Greer Mary Elizabeth Winstead Abigail Spencer Ed Begley Jr. Tom Hooper Josh Sussman Mark Lee David O. Russell Jacki Weaver Jennifer Lawrence Eveleigh Jerry Weintraub Kate Upton Chris Tucker Annabeth Gish Rachael Harris Caren Brooks Alicia Witt Shanola Hampton Christina McLarty Dennis Haysbert Eugene Sadovoy Dawn Olivieri Edward Menicheschi MIchelle Branch Beau Dunn Lukas Nelson Jennifer Zuccarini Malik Bendjelloul Gregory Siff Benh Zeitlin Dash Mihok Shasi Wells Four Seasons Hotel Beverly Hills Daisy O'Dell Paul Herman Vanity Fair Campaign Hollywood 2013 Vanity Fair Campaign Hollywood The Art Of Elysium's 6th Annual Pieces Of Heaven Charity Art Auction Presented By Ciroc Ultra Premium Vodka The Art Of Elysium's 6th Annual Pieces Of Heaven Charity Art Auction Ace Museum Tomasso Cardile TheWrap's 4th Annual Pre-Oscar Party Sharon Waxman Lara Lieto Vanity Fair And The Chrysler Brand Celebration Of "Les Miserables" In Support Of The Los Angeles Fund For Public Education Barneys New York And The Weinstein Company Celebration Of Silver Linings Playbook In Support Of The Glenholme School Matthew O. Russell Global Green USA's 10th Anniversary Pre-Oscar Party Angela Linvall Rachelle Carson Stewart Boxer