Hailey Bieber, who turns 24 years old today, stepped out in Los Angeles on Friday in a chic black outfit. Even in 2020, sometimes it feels good to wear something besides loungewear. She paired her shiny black latex Saint Laurent leggings with a YSL belt, a leather jacket, a polka-dot blouse, and a pair of black heels with gold buckles. She added a matching black face mask and patent leather purse.