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!

[Kim Kardashian via]