Solange Knowles was clearly fired up when she allegedly attacked Beyoncé's husband, Jay Z, in an elevator after the Met Gala, and now we have further insight as to what first caused the brawl.

The shocking clip, which was recorded May 5 at the Standard Hotel, shows four people, presumably, Beyoncé, Jay Z, Solange and a bodyguard entering the elevator before the aggravated woman, who is presumed to be Solange, begins yelling at the gentleman in white (purportedly Jay Z) before launching into an attack.

However, it appears that another incident went down before the brawl that has the entire Internet buzzing.

According to a source, "Solange and Rachel Roy got into an argument prior to the elevator incident," which apparently provoked the singer.

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