Kim Kardashian, Nicky Hilton and Molly Sims attend the Valentino Rodeo Dr. flagship store opening and 50th anniversary celebration; Michael Jordan kicks off the 11th annual Michael Jordan Celebrity Invitational Golf Tournament with a party at the Aria Casino; "Mamma Mia" opens at the Pantages Theatre with special guests Renee Olstead and Eric Balfour; Brooke Burns celebrates Daniella Clarke's new online shopping experience LuxeYard Style—it was all about fashion and fun at the midweek parties in Los Angeles and we've got all the details on the most fabulous parties and the celebrities who attended them on Tuesday and Wednesday in this installment of Last Night's Parties! More»

Josh Duhamel, Harry Shum Jr. and Chloe Moretz celebrate the launch of Sony's new PS VITA portable entertainment system with a party at Siren Studios; Nathan Lane hosts USA Network and The Moth's Storytelling Tour: A More Perfect Union: Stories of Prejudice and Power; Disney premieres its new made for TV movie, Radio Rebel, at the AMC CityWalk theater inside Universal Studios; Sports Illustrated and covergirl Kate Upton celebrate the annual "Swimsuit Edition" with a party at Haze Nightclub at the Aria Casino in Las Vegas—Wednesday was quite the day with new videogames, inspiration for our youth and gorgeous swimsuit models and we've got all the details on the events that took place in and around Los Angeles in this edition of Last Night's Parties! More»