Getty Images for Puma/Roc Nation

Kim Kardashian tried to steal the show at the Roc Nation pre-Grammy brunch in Beverly Hills on Saturday, but she had to compete with a smokin' hot Rihanna -- AND Beyonce!

Kim showed off her shorter hair and rocked a revealing red top and skirt combo, and she posted a photo on Instagram of Kanye West's new Yeezus 3 sneakers, which she handed out to guests at the bash. "Yeezy put me in charge of the fam distribution #YeezyBoost #AdidasOriginals #ThisFirstRunIsAsizeTooBig #WifeLife #WifeGotThatWork." At least she did something useful!

Jay Z and Kanye sipped on cocktails and posed for a few photos together, and Beyonce also made the rounds, along with Bad Gal RiRi, who gave both Kim and Bey a run for their money with her sexy Altuzarra getup...