Beauty Crush: Kourtney Kardashian's Sleek High Ponytail

Credit: Eugene Gologursky/WireImage

Fans of Kourtney Kardashian know that the E! star's go-to summer hairstyle has been a sleek top knot, but she stepped out with a fresh new 'do for her newlywed sister Kim and brother-in-law Kris Humphries' lavish welcome party in New York City on Wednesday.

The reality star, 32, pulled her hair into a sleek high ponytail and sported a silk LBD by Ted Baker with tiered ruffle detail and a sparkling statement necklace. While a bun would have showed off her shoulders and dazzling jewels just as much, the cheerleader-inspired style was super-cute and chic without looking too formal.

Sister and guest-of-honor Kim, 30, opted for glam, over-the-shoulder waves and a nude curve-hugging floor-length gown by Victoria Beckham, while hubby Kris, 26, coordinated with his new wife in a brown pin-striped suit.