WATCH: Celebrities Scream-Sing "Since U Been Gone"

I can't decided if I'm more Shaq or John Oliver....

...honestly, I'm probably a combination of both.

Jimmy Fallon challenged Tonight Show guests Kelly Clarkson, John Oliver, Rachel Brosnahan, Mumford & Sons, Meghan Trainor, Anthony Anderson and The Roots to sing Kelly's hard-to-croon hit "Since U Been Gone".

Everyone was equally awesome, except for maybe Meghan Trainor because she actually nailed it.

I've never felt more represented in a video ever. Thank you.

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