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Watch Frankie Grande And Friends Try To Hit Ariana's High Notes

Madison Beer, Lohanthony and more try out Ari's upper register in honor of her 22nd birthday.

It's no secret Ariana Grande's upper register is out of this world. So when MTV News set out to wish the "One Last Time" singer a happy 22nd, we enlisted the help of some of her closest friends and loved ones (plus, a few randos) to whistle tone their birthday greetings.

While her big bro Frankie may or may not have cheated, Lohanthony, Madison Beer and more tried their hand at impersonating the high note -- some more successful than others.

Check out the celeb b-day messages in the video above, and leave your own for Ari in the comments below!