alba-new-hair-sutc.jpgalba-new-hair-cash-sutc.jpgGetty Images for Entertainment Industry Foundation

No matter what she does with her hair, makeup and fashion, Jessica Alba always looks stunning!

Last night the actress/mom/businesswoman and hubby Cash Warren attended the Hollywood Stands Up To Cancer event in Culver City, and she wowed in a white lace Ralph Lauren dress and Jimmy Choo sandals. But the main focus was Jessica's newly shorn locks! Jess posted a photo of her new 'do on Instagram and wrote, "Thank u @jenatkinhair 4 my killer new #haircut! I [love] it! Heading 2 #standup2cancer event -thx 4 everything my sweet @jenatkinhair #hair @lauren_andersen #makeup @emilyandmeritt #fashions."

Reese Witherspoon and husband Jim Toth hosted the event, and notable guests included Gwyneth Paltrow, Christina Aguilera and Selena Gomez. Way to bring out the A-list for a good cause!