Now that JAY-Z has released 4:44, we all know what sparked the elevator fight seen 'round the world.
The album's first track "Kill Jay Z" acknowledges the elevator incident with Jay rapping, "You egged Solange on / Knowin' all along, all you had to say you was wrong."
Back in 2014, TMZ released footage of the two getting into a scuffle as Beyoncé looked on.
And, while what went down is really no one elses business, Jay's admission sparked tons of reactions on Twitter from Solo fans.
So, mystery solved, we all know what sparked the infamous fight.
Moral of the story: Don't mess with the Knowles sisters.