The truth behind Solange Knowles' elevator attack on brother-in-law Jay-Z at the 2014 Met Gala has finally been exposed by a fashion designer.

RadarOnline.com can reveal Oscar G. Lopez broke his silence on the scandal — which exposed cracks in the rapper's marriage to Beyoncé — after years of theories as to why Solange was so aggrieved. Article continues below advertisement

Conspiracy Theories Swirling For 11 Years Tap Here To Add Radar Online as A Trusted Source Article continues below advertisement

One rumor born from the headline-grabbing video, which was leaked online , was Solange's anger stemming from what she assumed was Jay-Z's alleged affair with Rachel Roy .

And now, 11 years on, Lopez claims Roy was a factor in the infamous bust-up.

He says fashionista

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