Credit: WeirPhotos / Splash News and Frazer Harrison/Getty Images Photo: Battle of the Sexy Slit: Kate Middleton vs. Rihanna (PHOTO)

Every woman knows that a little leg can go a long way. Whether you’re a duchess or a pop star, it never hurts to don a dress with a sexy slit every now and then.

On Tuesday, May 8, Duchess of Cambridge Kate Middleton wore a stunning Roland Mouret gown to Claridges Hotel in Mayfair, London. The conservative duchess showed off some of her killer legs thanks to the white frock’s tasteful thigh-length slit. She added a pair of metallic Jimmy Choo heels to complete her royal ensemble.

Across the pond, Rihanna bared some of her enviable gams in a Adam Selman dress paired with Manolo Blahnik heels at the L.A. premiere of Battleship on May 10. While RiRi’s dress was decidedly less demure, it showed off her sick physique via a thigh-high slit and plunging neckline.

The question is, who wore the high-slit dress best; the Duchess of Cambridge or the pop princess? Vote below!