Celebrity style: Jessica Alba

Actress Jessica Alba, star of the new film "Sin City", poses as her boyfriend Cash Warren (R) looks on at the film's premiere in Los Angeles March 28, 2005.[Photo/Agencies]

Actress Jessica Alba, dressed in Marchesa and wearing jewelry from Cartier, poses on the red carpet as she arrives at the 80th annual Academy Awards, the Oscars, in Hollywood February 24, 2008.[Photo/Agencies]