The 23-year-old model stepped out in a pair of skin tight black pants with her sheer polka-dot top and leather jacket for a business meeting on Friday (November 20) in Los Angeles.
Hailey also coordinated her look with a black face mask as she headed back to waiting car after the afternoon out.
The model will actually be celebrating her birthday this weekend and showed off a cake she received – and took a bite before her big day.
“Not my birthday yet, but it’s right here in front of me, so…” she wrote while taking a little bite.
Earlier this week, Hailey turned heads again in an eye-catching sweat suit as she met up with a pal for lunch.