Amber Heard, Diana Agron and Raquel Welch join Vanity Fair and Montblanc at the Hotel Bel-Air; Harvey Weinstein, Jessica Chastain and James Cromwell celebrate the 40th anniversary of Charlie Chaplain's honorary Oscar; Kate Beckinsale, Chloe Moretz and Rooney Mara attend the Costume Designers Guild Awards; and Amanda Seyfried, Jennifer Carpenter and Richard Greico (!) walk the red carpet in Hollywood for the L.A. premiere of "Gone"; Pharrell hosts a dinner party with Bevy Smith, Terry Richardson, Usher, and Charlize Theron: check out all the details of what went down on "Fat" Tuesday in Last Night's Parties!

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[Jared Leto, Usher, Terry Richardson via]

Cuba Gooding Jr. Vogue Vanity Fair Charlize Theron Daniel Benedict Graydon Carter Amanda Seyfried Samantha Ronson Terry Richardson Target jared leto Erika Christensen Kate Bosworth Harvey Weinstein Kate Beckinsale Cameron Diaz Andre Balazs Johnny Knoxville Jeffery Deitch Rose McGowan Marcia Gay Harden Andrew Saffir Chateau Marmont Cameron Silver Lupe Fiasco Montblanc Grace Kelly Daniel Sunjata Ashley Madekwe Amber Heard Lawrence Bender taylor spreitler Amber Valletta Jane Lynch Ellen Pompeo Julia Ormond Brian Grazer Clint Eastwood Wolfgang Puck Pharrell Williams Usher Chelsea Handler Dianna Agron Beverly Hills Hotel Olga Kurylenko Paz Vega Orson Salazar Wes Bentley Victoria Hervey Dolores Chaplin joan collins Arclight Laurence Fishburne Eli Broad Edythe Broad Danny Huston Ellie Kemper Jackie Collins Raquel Welch Jennifer Carpenter Rooney Mara Chloe MOretz Jessica Chastain Jesse Williams Drea de Matteo Alana Stewart Marg Helgenberger Bevy Smith Pharrell Busy Philipps Linda Thompson Jess Weixler Carla Ortiz Meredith Monroe Last Night's Parties Cheryl Tiegs LNPs Fivel Stewart Jackson Rathbone ArcLight Hollywood Christa B. Allen Gabriel Mann Madeleine Stowe Orlando Jones Columbus Short Thomas Gibson Alexander Payne Penelope Ann Miller Irena Medavoy Boo Boo Stewart Missi Pyle Beth Grant James Cromwell Sally Kellerman jeannie mai Rob Friedman Gelila Assefa Len Wiseman Julie Delpy