ARIANA Grande's brother Frankie has been slammed for his telling reaction to Tate McRae's raunchy VMAs performance.

Frankie , 42, was seen watching Tate McRae sing and dance at the MTV Video Music Awards on Sunday night .

Shaking his head as Tate performed, Frankie's reaction was caught on the POV backstage camera.

Tate, 22, performed raunchy renditions of her hits Revolving Door and Sports Car, leaving many hot under the collar.

As she crooned, the audience was seen dancing and singing along.

Fans instantly clocked how Frankie looked unimpressed as she shook his head with a stoic look on his face.

Reacting to Frankie shaking his head, fans flocked to the comments underneath the livestream.

One person asked, "Why Frankie shaking his hand when Tate was performing??"

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