We're learning more about this terrible tragedy.
Oh geez, Solange!
It looks like she was all about starting trouble with ANYONE on Met Gala Monday!
And Beyoncé's baby sis was apparently all about stirring the pot with every person she came into contact with!!
The insider added that Beyonce "got in the middle" during their spat, though it remains unclear what the screaming match was about.
Solange accompanied the designer to the 2012 Met Gala in the (above) photo — so something had to clearly set her off, since the ladies are old friends.
We know the Loosing You performer has a history of violently verbal outbursts, but with a pal AND her brother-in-law??
Something is seriously wrong here!
[Image via WENN.]