Kim Kardashian, Kanye West, Jay Z, Beyonce party hard at Roc Nation's Pre-Grammy gig

The Carters and the Wests put all rivary behind them and partied together for the first time since the KimYe wedding disaster in May 214

Kim Kardashian and Kanye West were looking gorgeous as they reunited with music's royal couple, Jay Z and Beyonce at the Roc Nation pre-Grammys brunch in Beverly Hills, February 7.

The couples – who have been rumored to be rivals since the Carters missed out on the elaborate KimYe wedding last May, put of a united front at the cocktail gig.

Kim debuted her new short hair-cut while donning a red hot cropped top and maxi skirt. Her beau was in his familiar all-black look, in tee and jeans and some expensive pair of kicks.

On the other hand, Queen Bey was in an all black sequin jumpsuit which almost exposed her boobs thanks to the deep plunging neckline. Jay Z rocked a black jacket, white tee and black jeans for the show.

Both Beyonce and West will be performing at the 2015 Grammys on Sunday, Feb. 8. Us Weekly broke the news that Queen Bey will sing the old gospel hymn "Take My Hand Precious Lord" before transitioning into Common and John Legend's "Glory" off the Selma soundtrack.

The longtime pals looked very happy as they mingled with friends and fans but Kanye and Jay looked incredibly chummy as photographers snapped pictures of them drinking and toasting with D'USSE cocktails a crowd that included Rihanna, Nicki Minaj, Demi Lovato, Nick Jonas, Paris Hilton, Adrienne Bailon, Willow Smith, Janelle Monae, Keke Palmer, Kylie Minogue, and more.