Pint-sized pop star Ariana Grande had a choice word for fans after a recent radio show visit: Die! Confidenti@l has learned that while visiting a Manhattan radio station this summer, the 21-year-old "Better Left Unsaid" singer should've left her thoughts unsaid.

"She did autographs and pics and was all smiles until she got into the elevator," a stunned industry insider tells us. "And as soon as the doors shut she said, 'I hope they all fucking die.' "