Jay-Z & Solange Knowles 'attack' video LEAK, NYC hotel 'shocked' by epic elevator fight: Beyonce 'Bad Influence' Instagram PHOTO sparks sister feud?

It's the epic elevator fight heard around the world - Solange Knowles vs. Jay-Z!

Check out ALL Mstars coverage of the post-Met Gala showdown here:

Beyonce vs. Kim Kardashian vs. Rihanna: cheating scandals erupt after Jay-Z & Solange elevator attack, which hip-hop couple will survive? [POLL] 

Beyonce vs. Rihanna beef intensifies amid viral Jay-Z & Solange Knowles elevator fight, cheating scandal?

Solange vs. Jay-Z Elevator Fight As Beyonce Watches [VIDEO]: Cheating scandal ensues

Jay Z & Solange Fight Trending on Twitter [VIDEO] Fans React #WhatJayZSaidToSolange

 Jay-Z & Solange Best Fight Memes [PHOTOS]: Did Beyonce cheating scandal start elevator fight?

Solange Extended Elevator Fight [VIDEO]: Sister snaps and kicks rapper before exiting elevator

Jay Z & Solange Fight re-enacted by 50 Cent [VIDEO]: Check out hilarious Instagram Video

Beyonce and Solange Jet to Costa Rica after Jay Z Elevator Showdown

Pretty intense, considering Solange and Jay are basically family.

So, what led to the aspiring songstress' infamous freak-out? That still remains a mystery... and according to reps for the Standard Hotel in NYC, they have NO idea how the viral surveillance footage leaked online!

Right...

On Monday (May 12), the high-end venue released this statement:

"We are shocked and disappointed that there was a clear breach of our security system and the confidentiality that we count on providing our guests."

Way to save face! The official statement continues, "We are investigating with the utmost urgency the circumstances surrounding the situation and, as is our customary practice, will discipline and prosecute the individuals involved to our fullest capacity." 

Meanwhile, Queen Bey posted this rather cryptic post on Instagram:

The "Drunk in Love" beauty ideally stood there while her sister attacked her hubby - so what's up with that? Is Beyonce angry at Solange, or her baby daddy? Apparently as-of-now, neither...

Rumors also suggest that Miss Knowles just deleted all social media photos and posts involving her older sis (via HollywoodLife.com). Wow... is a heated sibling feud brewing? Stay tuned!