Last night in NYC, Maria Baibakova hosted Artspace's 2nd Anniversary Dinner at the James Burden Mansion, Jeff Koons debuted his new exhibition to Larry Gagosian, Petra Nemcova, Prabal Gurung, and others at the Gagosian Gallery, Alexandra Lebenthal invited guests over for the Style of Sport launch party, Freida Pinto and Barneys NY celebrated Maiyet Varanasi's silk capsule collection, and so much more!

Go HERE for more photos by Evie C. and tag yourself and your friends!

Last night Tommy Hilfiger and his many friends in high places joined the designer in celebrating the highly anticipated arrival of his West Coast flagship with a soiree at its West Hollywood location. Along with co-hosts Jessica Alba and Cash Warren, check out the famous faces like Drew Barrymore, Olivia Munn, Julianne Hough and David Burtka who turned out in droves to the grand opening event for a first look inside the iconic American designer's new digs on the corner of Beverly and Robertson Boulevards.

A little rain didn't stop Demi Moore, Rachel Zoe, Emma Roberts and other stylish ladies from coming to see Ferragamo's 2013 Spring collection; Jeremy Renner, Will Ferrell and more attend the Hansel & Gretel: Witch Hunters premiere; Nicole Richie, Molly Sim and Joel McHale step out for ELLE's 2nd Annual Celebratory Dinner for Women in Television; Brandon Boyd, Jason Schwartzman and other art lovers attend the Art Los Angeles Contemporary's opening night reception; Steven Tyler and Kate Hudson collaborate for The Voice Institute's Raise Your Voice Benefit—get the skinny on L.A.'s top Thursday events in this edition of Last Night's Parties.

Mena Suvari, Jeffrey Deitch, Rosson Crow and James Goldstein celebrate the 15th anniversary of a classic Fendi handbag; RJ Mitte, Megan Tandy and Kurt Yaeger ring in the 4th Annual Burbank International Film Festival with a documentary about disability in film and television; Common, Big Sean, Ne-Yo and Jennifer Williams turn Bagatelle into the Moët Rose Lounge; John Mayer delivers a surprise performance alongside The Wanted (and, far more importantly, Korean rap superstar PSY) at MTV2's pre-VMA party at Avalon. Wednesday night's celeb-packed fun spanned music, fashion, film and luxury, and we've got all the details in this edition of Last Night's Parties. More»

Matthew McConaughey and Olivia Munn hit the premiere of Magic Mike; the L.A. Sparks help raise funds for cancer awareness at the Hoops & Heels event;Susan Lucci, Deborah Gibson and Anderson Cooper attend the 39th Annual Daytime Emmy Awards; Reba McEntire and Chaka Khan perform at Hollywood Bowl Opening Night Gala; Corbin Bernsen, Bailee Madison and Nathan Gamble hit World premiere event of 25 Hill—it was yet another event-filled and star-studded weekend all over L.A., and we have all the details of what went down in this edition of Last Night's Parties. More»

J.J. Abrams and his wife Katie McGrath team up with Coach to host a star-studded Santa Monica rooftop fundraiser with big names including Joss Whedon, Jeremy Renner, Kristen Bell and Timothy Olyphant; Christinia Milian and Corey Feldman take in a classic Slick Rick performance at the Music Saves Lives benefit; Jerry Bruckheimer and former Congresswoman Gabrielle Giffords (alongside her astronaut husband) are honored at the Simon Wiesenthal Center's annual National Tribute Dinner at the Beverly Hilton; Kristin Davis hosts a high-end silent charity auction for designer handbags at a Beverly Hills manse once inhabited by Brad & Jen. There was plenty of high-end, charitably-minded fun going on last night, so make sure to check out all the action in this Thursday edition of Last Night's Parties!

Jeremy Renner & Olivia Munn at the Coach Children's Defense Fund Benefit at Bad Robot [via] More»

Last night in NYC, Blood Orange opened up for Florence and the Machine at Radio City Music Hall, The Beach Boys reunited at Beacon Theater for their global 50th anniversary tour, Cameron Diaz and Elizabeth Banks came out for the screening of "What to Expect When You're Expecting," Martin Scorsese got down with Tyra Banks at the Moth Ball, and more. Last night's parties were all about the live music. More»

Rock legends and royalty like Lisa Marie Presley, Riley Keough, and Steve Jones join Linda Ramone for the launch celebration of Johnny Ramone's autobiography; Kelly Wearstler, Owen Wilson, Jeffrey Deitch, Alexander Von Furstenberg and more toast the opening the new heavily-Warhol influenced MOCA exhibition; Amy Smart, Elisabeth Shue and many other animal lovers help raise funds to support the mission to make all of L.A.'s animal shelters no-kill—get the details on the array of star-studded events that went down around town over the weekend in this edition of Last Night's Parties. More»

Last night in NYC, the New York Academy of Art threw their Tribeca Ball with guests like Robert DeNiro and Solange Knowles, Marc Jacobs sponsored an "urban hoedown" complete with fashionistas like Giovanna Battaglia and Michelle Harper, Neon Trees performed at the Bowery Ballroom, the Cinema Society hosted the premiere of "Safe" at PH-D at Dream Downtown, "The Raven" held a special New York screening at Sunshine Ladmark, and more! Last night's parties were all about getting "gown and dirty." More»

Go HERE for more photos by Marielle Sales and tag yourself and your friends!

Last night, Marc Jacobs sponsored the Art Production Fund's Urban Hoedown at 33 West street. Founded in 2000, the Art Production Fund is a non-profit organization that helps artists produce pieces that would be difficult to create alone, while also raising awareness for contemporary art. With a complete set of line dancers, a mechanical bull, and a performance by Ryan Bingham, the event also honored artists such as Kiki Smith, Mark Fletcher, and Tobias Meyer. More»