Jennifer Lawrence and Leonardo DiCaprio toast champagne while Charlize Theron and Bill Clinton trade fedoras backstage at the GLAAD Media Awards; Demetri Martin and Molly Ringwald debut their tomes at the Festival of Books; David Arquette and James Van Der Beek attend the Ballet Rubies Gala; Jeffrey Deitch, Ellen Pompeo and Terry Richardson hit up the "Yesssss!" 2013 MOCA Gala; the brothers Hemsworth aren't too cool for school at the City Year Los Angeles' Spring Break: Destination Education Party—were you at Coachella Weekend 2? These celebs weren't either. Check them all out at L.A.'s top events in this weekend edition of Last Night's Parties.

[Soledad O'Brien, Randi Zuckerberg, Sade Baderinwa, guest, Trisha Yearwood, Allison Williams, Aimee Mullins, Andie MacDowell via]

Last night in NYC, Allison Williams and Arianna Huffington presented awards to this year's L'Oreal Paris Women of Worth winners, Elijah Wood stepped out for the NYC premiere of The Hobbit, Alicia Keys and Jennifer Hudson performed at the Apollo Theater, and much more!

Emma Watson, Nina Dobrev, Dylan McDermott and others step out for the Hollywood premiere of The Perks of Being A Wallflower; Mindy Kaling, Zooey Deschanel and more FOX stars hit the network's Fall Eco-Casino party; Albert Brooks and Allison Janney are among the many who attend the Finding Nemo: 3D premiere—get the lowdown on what happened Monday in this edition of Last Night's Parties. More»

Last night in NYC, Friends performed at Le Baron for part four of the Encore! Live Sessions, Chloe Sevigny and Adam Brody attended the after party for Damsels in Distress at the Soho Grand Hotel, Roma took the stage for Avenue A Soundcheck's Monday Rock series, Martin Scorsese honored Catherine Deneuve at the 39th annual Chaplin Award Gala, and so much more. Last night's parties were all about the music! More»

Sundance 2012 is off and running - and despite the icy storm that covered Salt Lake City, party hoppers bounced from place to place successfully. From Drake's performance at the Bing Bar, to Lil' Jon and Paris Hilton hanging out at Tao, to the Bertalli Meal Soup Chalet, to Marina Ambramovic's silent party, to the "Black Rock" dinner party and more, Sundance's parties were all about the film buffs. 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»

From Betty White to Robert Pattinson, it was raining stars at the People's Choice Awards; Shenae Grimes and Stephanie Pratt attend the opening of a Swiss timepiece flagship on Melrose; Liam Neeson, Kristen Bell and fellow faces of the big screen hit the downtown premiere of The Grey; Michelle Williams, Bradley Cooper, Lindsay Lohan and more celebrate awards season with the Weinstein Co. and Audi at Chateau—we have your details on how red carpet season kicked into high gear this week in this installment of Last Night's Parties. More»

Jeffrey Katzenberg, Chris Miller, Salma Hayek, Antonio Banderas

Salma Hayek and Antonio Banderas help launch Awards Season at Chateau; Dolly Parton and Queen Latifah hit their Hollywood movie premiere; Patrick Dempsey attends the McLaren Beverly Hills opening; Disney ABC host a Winter Press Tour with Krysten Ritter, Andie McDowell, and Leslie Bibb; Forevermark and InStyle take over Bar Nineteen12 at the Beverly Hills Hotel for a party with Michelle Williams, Jessica Alba, and other leading Hollywood ladies—Monday and Tuesday night were bustling with events all over the city, get the details on what went down in this edition of Last Night's Parties. More»

Last night, Alicia Keys debuted the new Broadway play Stick Fly, Mia Moretti and Jesse Marco spun at Santos Party House, L'Oreal held their annual Women of Worth Awards, Uma Thurman and Julianne Moore celebrated with Waterford, and so much more.  Last night's parties were all about the DJs. More»

While we were recovering from a Thanksgiving food coma this past Friday, the most glamorous, fairytale event of all was taking place across the pond-The Crillon Ball.  The city of lights played host to a flock of lucky young ladies as they "came out" at le Bal, with no shortage of cavaliers, champagne flutes and haute couture. Here's a look at this year's socialite roster and the past decade of dashing debutantes.

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