Spotted!: Actress Jessica Alba spent a night out in Las Vegas for the Chanel Numéros Privés party at the Wynn hotel January 20, 2012 in an alternating black and white patterned silk dress from the Chanel Resort 2012 Collection. Alba kept the look classic with Chanel Fine Jewelry including black and white flower cocktail rings and a studded bracelets. She added a pop of color with dark red lips and finished the look off with sleek, straight hair.