Showdown! Beyonce vs Nicki Minaj (photos)

Minaj had a mock showdown backstage at the Tidal X: 1020 charity concert in Brooklyn New York last week. The video was just released on Beyonce's Facebook page. 'By the way, ice grill me as long as you can,' the Beyonce, 34, tells Nicki, 32, in a newly released behind-the-scenes video. The 'ice grill' is considered to be a cold fear-provoking stare. They duo were rehearsing for a concert when Bey suggested they have a contest. See more photos after the cut