Nicki Minaj has a message for BET: Don’t mess with the Queen.

The 36-year-old musician announced she was pulling out of a high-profile summer concert after the event’s sponsor, cable network BET, appeared to mock her during Sunday night’s Grammy Awards telecast.

In a since-deleted tweet, BET noted that Cardi B—who’s feuded with Minaj in the past—had become the first woman to win Best Solo Rap Album. “Meanwhile,” the tweet reportedly added, “Nicki Minaj is being dragged by her lacefront.”

Minaj, who’s been nominated for 10 Grammys—yet never won—responded by posting a screenshot of BET’s tweet on her Twitter feed, which has more than 20 million followers. In a follow-up tweet, she announced that neither she nor any of the acts on the famed Young Money label would be appearing at June’s BET Experience. Minaj and Young Money founder Lil Wayne, both major concerts draws, were slated as headliners for the multi-day festival.