Last night in NYC, Anne Hathaway, Ciara, SJP, and more attended the Tate Americas Foundation Artists Dinner at Skylight at Moynihan Station, Mykki Blanco performed for the Frieze New York Art Fair kick-off party at MoMa PS1, Queen Latifah and Valentino Garavani stepped out for the 2013 NYC Ballet Spring Gala, Jake Gyllenhaal joined The Headstrong Project's Zachary Iscol at the first ever Words of War event, and so much more!

Zac Efron shows up on time for Hublot's celebration of new brand ambassador Kobe Bryant; Jon Hamm, Christina Hendricks, Elisabeth Moss and the rest of the "Mad Men" cast turn out for the Season 6 premiere; Jason Bateman and Emma Rossum make memorable appearances at a gala benefiting the Alzheimer's Association; Neil Patrick Harris attends Hollygrove's Norma Jean Gala; Christina Ricci and Rosie Huntington-Whiteley look stunning at the BlackBerry Z10 launch; Leandra Medine, Liberty Ross and Brooke Davenport shop the Christian Dior pop-up at Maxfield—it was a very busy Hump Day here in L.A. and we have the rundown on it all in today's edition of Last Night's Parties.

Nick Simmons, India de Beaufort and Jennifer Freeman are among those who step out to support the merging of fashion and music at the third annual Los Angeles Times' "Rock/Style" Event; the historic Beverly Hills hotel is the perfect backdrop to celebrate the "2012 Icon Awards" with guests including Sidney Poitier, Natalie Cole, Morgan Freeman and Quincy Jones; Popular star couple Robin Thicke and Paula Patton attend the Sundance Institute Benefit Presented By Tiffany & Co. at the swanky Soho House. Get your Thursday dose of what's going on in L.A. in this edition of Last Night's Parties!

Morgan Freeman and Sidney Poitier at the Icon Awards [via] More»

Vanity Fair hosts an Oscar Party worthy of the entertainment gods; Kim Kardashian attends Elton John's glamorous Academy Awards viewing party; Petra Nemcova steps out for The Weinstein Company's Oscar after party; Pharrell Williams and Esperanza Spalding enjoy themselves at Hans Zimmer's post-awards show fete; Jean Dujardin gets his Oscar engraved at the Governors Ball—Awards season wasn't officially over until the Academy Awards after parties ended in the wee hours of this morning and we have  the details on the hottest events of the evening in this installment of Last Night's Parties, Oscar Night Edition! More»

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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From Theophilus' live-streaming performance at Bing Bar, to Paris Hilton dancing all night in the DJ booth at TAO with her brother Barron Hilton, to Quincy Jones being the party animal and supporting his daughter at the after party of 'Celeste and Jesse Forever' and more, Sundance's parties were all about family. For more coverage, check out our correspondent Party Baby for the latest news! More»

HBO kicked things off at Circa 55, where guests like Jane Fonda, Guy Pearce, and Ewan McGregor, and winner Claire Dane munched on beef tenderloin and sipped martinis. NBC had A-listers Jon Hamm, Colin Firth, and Nicole Richie schmoozing under the stars at the Beverly Hilton rooftop - right across from where Harvey Weinstein kept the company of Golden Globe winners Meryl Streep and Jean Dujardin, as well as Leo DiCaprio and countless other guests at his annual party. See this and so much more on our Golden Globes after party round up... MORE>>

After the awards ceremony winded down, celebrities dispersed into the night and the red carpets were rolled out yet again, mostly decking the halls of the Beverly Hilton, where the majority of Sunday's after parties were held. HBO kicked things off at Circa 55, where guests like Jane Fonda, Guy Pearce, and Ewan McGregor, and winner Claire Dane munched on beef tenderloin and sipped martinis. NBC had A-listers Jon Hamm, Colin Firth, and Nicole Richie schmoozing under the stars at the Beverly Hilton rooftop - right across from where Harvey Weinstein kept the company of Golden Globe winners Meryl Streep and Jean Dujardin, as well as Leo DiCaprio and countless other guests at his annual party. More»

Kate Hudson, Cameron Diaz, Drew Barrymore [via]

Michelle Williams, Jennifer Garner and more attend special screenings of their films showing in the 2011 AFI Fest; Robert Pattinson, Jon Hamm and more honor the work of those behind the scenes in entertainment; the first ever LACMA Art + Film gala co-hosted by Leonardo DiCaprio brings out one of the most star-studded crowds we've ever seen, with everyone from Zac Efron, Clint Eastwood and Zoe Saldana, to Stevie Wonder, Julian Schnabel and Jane Fonda—we, could keep going but we'll stop there, so come take a look at everything that went down this busy weekend in L.A. in a super-size edition of Last Night's Parties.