A mix of celebrities and famous professional athletes celebrate the Sports Spectacular 28th Anniversary Gala; Vince Vaughn, Andy Samberg, Sarah Silverman and other comedians bring laughs to "The Big Live Comedy Event" for YouTube Comedy Week; Ginnifer Goodwin, Malin Akerman, Christa B. Allen and other network stars light up the Disney Upfronts; Hailee Steinfeld and Diablo Cody among others attend The Magic Bracelet premiere; Ozzy Osbourne, Natasha Bedingfield and Kathy Girffin entertain the crowd at an event for the L.A. Gay & Lesbian Center; Chord Overstreet and Rumer Willis game it up at the Donkey Kong Island Pool Party—get caught up on L.A.'s busy weekend in this installment of Last Night's Parties.

Scott Caan, Sugar Ray Leonard and Joe Pesci hit the green at 10th Annual James Caan Golf Classic to benefit the Impact Treatment Center; Diane Kruger, Rachel Zoe, Emma Roberts, Zoe Saldana and many more of Hollywood's most stylish attend a dinner hosted by MAC Cosmetics and Vogue celebrating Prabal Gurung at Chateau Marmont; Annette Bening, Jackson Browne, Rita Wilson and others honor Billy Crystal the annual Backstage at the Geffen Gala; Ellen DeGeneres and Samuel L. Jackson join Steve Harvey at his Hollywood Walk of Fame star presentation ceremony—from golf courses to exclusive dinner parties, get the rundown on Monday's top events in this installment of Last Night's Parties.

Olivia Munn, Aaron Sorkin, Ginnifer Goodwin, Norman Reedus and more TV stars and creators honor their shows at the 30th Annual PaleyFest; David LaChapelle, Russell Westbrook and others join in the release celebration of Flaunt Magazine's 'Plutocracy' issue; Zachary Levi, Seth Green, Clare Grant and more hit the music video launch of Team Unicorn's "For The Win!"—get caught up on the weekend's top L.A. events in this installment of Last Night's Parties.

Olivia Munn, Eva Longoria, Jaime King and more party with Juicy Couture and Vanity Fair; Janina Gavankar, Rachel McDowall and other nominees are recognized at the 6th Annual Toscar Awards; Anne Hathaway, Joel McHale, Steve Martin and a fashionable swarm of A-Listers strut their stuff at the 15th Annual Costume Designers Guild Awards; Mila Kunis is feted as the new brand ambassador for Gemfields; Kirsten Dunst, Kate Walsh, Drew Barrymore, Julianne Moore and many others shine at the celebration of BVLGARI's Elizabeth Taylor jewelry collection; Chloe Moretz, Freida Pinto, Trey Smith and young Hollywood stars party at the Vanity Fair Campaign Hollywood 2013 D.J. Night—get the rundown on Monday and Tuesday's top events around town in this edition of Last Night's Parties.

Zoe Kazan and Paul Dano hit the Hamilton Behind the Camera Awards; Christina Hendricks and fellow "Mad Men" cohorts celebrate humanitarian efforts in Beverly Hills; Jennifer Aniston, Sean Penn, Robert Pattinson, Drew Barrymore and half of Hollywood honor Stanley Kubrick and Ed Ruscha with LACMA; Emma Roberts, Reese Witherspoon, Aziz Ansari and Anna Wintour welcome the new rag & bone flagship to Melrose; Leslie Mann, Judd Apatow and Michelle Pfeiffer raise funds for Cedars-Sinai Women's Cancer Program—it was another busy weekend in L.A. and we have the rundown on the top events for you in today's edition of Last Night's Parties.

Alessandra Mastronardi, Simona Caparrini, Alison Pill, Greta Gerwig [via], Kiernan Shipka, January Jones [via]

Oliver Stone and Taylor Kitsch party with Los Angeles Confidential at Palihouse; Hailee Steinfeld, Ginnifer Goodwin, January Jones and other up-and-coming talent attend the 14th Annual Young Hollywood Awards; Woody Allen kicks off the 2012 L.A. Film Festival with his new movie and stars Greta Gerwig and Penelope Cruz—here's your final event rundown of who hit the town before the weekend in this edition of Last Night's Parties. More»

Last night in NYC, Kanye came out to Tom Sachs' private preview of space program's on Mars at the Park Avenue Armory, Diane von Furstenberg attended the Whitney Museum's Art Award Gala, Beach House rocked the Bowery Ballroom, Joan Rivers honors Annie Leibovitz at the CLIO Awards, and more! Last night's parties were all about the arts! More»

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On Saturday Capitol File Magazine presented an awesome after party to conclude an unforgettable weekend of WHCD events. The star-studded black tie event was held at the Newseum, and was hosted by Claire Danes, Capitol File publisher and EIC Sarah Schaffer, and Niche Media CEO Katherine Nicholls, and was the final weekend celebration for some of the District's most important media faces, celebrities and socialites. More»

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Last night, Lani Hay of Lanmark Technologies hosted a dinner with Elle Magazine's Maggie Bullock and the Creative Coalition's Tim Daly and Robin Bronk celebrating women in media. The event kicked off the White House Correspondents' Weekend festivities at the Ritz Carlton, and guests enjoyed a casual reception in the hallway before taking to their seats. More»