Over the weekend in L.A., Leonardo DiCaprio chatted it up with Tyler The Creator at the Mark Ryden Exhibition at the new Kohn Gallery, Steven Tyler, CeeLo Green, and Alessandra Ambrosio attended the 21st Annual Race to Erase MS, the cast of "Downton Abbey" got together for a star-studded panel discussion and much more! Click through for the details.

The Guest List

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Leonardo Dicaprio• Tommy Hilfiger• Karina Smirnoff• moby• Jason Biggs• Daisy Fuentes• lea michele• Martin Short• Patricia Arquette• Kelly Osbourne• Alessandra Ambrosio• George Hamilton• frances bean cobain• Jordin Sparks• Randy Jackson• Steven Tyler• James Van Der Beek• Jon Lovitz• Natalie Cole• Howie Mandel• Cheryl Burke• Shaun Robinson• Garcelle Beauvais• Lea Thompson• Jim Belushi• Nancy Davis• Linda Ramone• Lisa Edelstein• Carmen Electra• Mark Ryden• Jack Osbourne• Clementine Ford• Thora Birch• Benedikt Taschen• Tyler The Creator• Eva LaRue• Rob Corddry• Beth Littleford• Barry Sloane• Race to Erase MS• Crystal Reed• Anna Trebunskaya• Frances Fisher• Holland Roden• Allison Baver• Laura Vandervoort• Johnathon Schaech• Jack Huston• Shemar Moore• Bailee Madison• Maria Bell• Cody Simpson• Keegan Allen• Candace Cameron Bure• Gareth Neame• Weird Al Yankovic• Bridgit Mendler• Bill Bell• Alex Newell• JD King• Zoey Deutch• Teri Garr• Byron Allen• Loni Anderson• Tony Dovolani• Christine Devine• Eric White• Cobi Jones• Avan Jogia• Joanne Froggatt• Julian Fellowes• CeeLo Green• Sophie McShera• Lindsay Arnold• Kimberly Van Der Beek• Tamera Mowry-Housley• Phyllis Logan• Chloe Noelle• Addison Riecke• Robert James-Collier• Michael Kohn• Jenny Biggs• Azure Parsons• Lindsey Way• Lani Hammett• Jerry Glaser• Samantha Glaser• Ellen Mathews• Kohn Gallery Private Preview and Inaugural Mark Ryden Exhibition• Kohn Gallery• Will Finn• Dan St. Pierre• CAMRYN• Dean Singleton• Lisa Rinna and Harry Hamlin• David Osmond• and Francesca Capaldi• 21st Annual Race to Erase MS