WATCH: Beyoncé and Nicki go head to head in staring contest

At last week's TidalX1020 concert, the night was filled with megastars doing what they do best; but the most memorable performance of them all was Beyoncé and Nicki Minaj. 

But of course they didn't just show up and perform; no, these ladies went through gruelling rehearsals so everything went down perfectly. 

Considering how flawless their performance was, you know they put in a lot of work backstage. And at the beginning of the week we got a tiny glimpse of some of those intense preparations – which includes a staring contest.

"Let's see who cracks first…"