Beyonce may seem to keep most things to herself, but even the Queen can share some in-depth look into how rehearsals are like when she's around.

Yes, Queen Bey shared a video of herself with Nicki Minaj - while the two practice for their "Feeling Myself" performance, which actually happened last week at the TIDAL X: 10/20 Amplified by HTC concert at the Barclays Center in Brooklyn, New York.

Turns out, Beyonce and Nicki Minaj had a bet going on all this time.

The video, entitled "Ice Grill," features the two divas rehearsing a move - the two turning towards each other with fierce looks in their eyes - as part of the choreography.

In the behind the scenes video, Beyonce tells Nicki Minaj, "By the way, ice grill me as long as you can. Let's have a contest. Let's see who cracks first. I have a feeling I'm gonna crack first."

Surely you must be wondering what an "ice grill" actually is. Well, E! News gives a pretty good description:

"Ice grill?! Don't worry, we'll fill you in. 'Ice grill' is a term similar to 'mean mug,' where you look aggressively at another person with a stone-cold face to let them know you're either in a bad mood or ready to throw down."

In fact, the video shows Beyonce and Nicki Minaj practicing the ice grill three times. Nicki Minaj was the first one to crack during the first bout, while Beyonce cracked during the second round.

The third time looked to be a tie, however, everyone knows that the real round (and winner) can only be declared once the two hit the stage of the TIDAL X: 10/20 concert donning Ashton Michael creations.

The footage ended with, "Who cracked first?" The teaser didn't really give the answer away, and while fans kept their speculations on Twitter, a user seemingly hinted on who the winner is, thanks to a Vine video.