Sources claim before Solange Knowles went berserk on Jay Z in the elevator following the Met Gala [click here if you missed that] she screamed on Damon Dash's ex-wife Rachel Roy…
From Us Magazine
A source tells Us Weekly that Beyonce's younger sister had yelled at designer Rachel Roy earlier at the after party, which was held at the Boom Boom Room in the Standard Hotel.
Before any fighting occurred at the Boom Boom Room last Monday, the Knowles sisters were actually having fun at the downtown NYC hotspot. An eyewitness told Us that the sisters hit the dance floor with supermodel Naomi Campbell, while Jay Z "hung back at one of the fireplace areas."
The same source added that the trio did "abruptly leave," but witnessed no drama leading up to their departure.
