Last Night's Parties: Steve Aoki's Dim Mak Turns 15; Jon Hamm & Duran Duran Celebrate "South Park"; Kate Bosworth Turns Out For Christopher Bollen's Novel Launch

Jon Hamm, Matt Stone, Trey Parker and Eli Roth rock out to a surprise Duran Duran performance at the "South Park" 15 Year Anniversary; Dim Mak takes over Dim Mak Studios and Paul & Andre for the label's 15th birthday with DJ sets by Steve Aoki and slew of others; Kate Bosworth, Julia Clancey and more toast Christopher Bollen's first novel with Interview Magazine at Soho House—there was much to celebrate around L.A. on Tuesday, let's go through the details in this edition of Last Night's Parties.

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South Park 15 Year Anniversary Party

Where: Barker Hangar Who Was There: Matt Stone, Trey Parker, Jon Hamm, Les Claypool, Eli Roth, Julie Brown, John Taylor, Simon Le Bon, Nick Rhodes, Roger Taylor, Larry LaLonde, Norman Lear, Stuart Copeland. Other Details: To celebrate 15 years of the "South Park" crew, creators Matt Stone and Trey Parker thew an anniversary bash at Barker Hangar in Santa Monica. An eclectic groupof guests including Les Claypool, Jon Hamm, and Eli Roth came out for the festivities which had a very special surprise performance by a little band called Duran Duran. Top that! [See the full post on this event HERE!]

Dim Mak's 15 Year Anniversary Party

Where: Dim Mak Studios and Paul & Andre Who Was There: Steve Aoki, Felix Cartal, Mark Hunter, Alvin Risk, Rob Roy, Villains, Dan Sena, Autoerotique. Other Details: While the "South Park" family rocked out to "Rio", another 15-year anniversary blowout was taking place across town in Hollywood for Steve Aoki's Dim Mak Records. For the special occasion, Dim Mak took over Dim Mak Studios and Paul & Andre next door for a super-sized double-trouble celebration. DJs spun some electric sets for the stoked crowd and you best believe it was a tropical sweat fest.

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Interview Magazine Celebrates Christopher Bollen's Lightning People

Where: Soho House Who Was There: Christopher Bollen, Kate Bosworth, Fernanda Romero, Kaari Upson, Katheryn Andrews, Steve Shaw, Larry Murphy, Steve Shareshian, Justin Kern, Nadine Valzquez, Eli Diner, Aimee Roa, Sarah Roa, Anh Do, Amy Freeman, Andrea Longacre-White, Joanna Fiduccia, Tyler Coburn, Anne Philippi, Hannes Grassegger , Kate Linthicum, Amos Pizzey, Julia Clancey, Rich Koehler, Andrea Tetrick, Matthew Specktor, Bill Esher, Juvemal Rodriguez, Brenden Fowler, Elizabeth Whitney Bedford, Patrick Rapold, Bucky Fukumoto, Bethany Ritz, Chris Black, Mike Welch, Zen Freeman, Evan Winiker, David Bernad, Princess Theodora. Other Details: In honor of his first novel Lightning People, Interview Magazine hosted a party for author Christopher Bollen at Soho House. The event boasted a stylish crowd of young-ish professionals and the ever lovely Kate Bosworth, who swilled cocktails as they got a chance to mix it up with the author. [Kate Bosworth photo via]