Must-see morning clip: Billy Joel and AC/DC's Brian Johnson perform "You Shook Me All Night Long" last night

This will either be your favorite video today, or a total musical nightmare!

Is it the greatest viral video Saturday morning for people who came of age in the '70s and '80s?

First Kevin Bacon recreates "Footloose."

Now here's Billy Joel and Brian Johnson of AC/DC, performing "You Shook Me All Night Long" at Madison Square Garden last night.

YouTube's Angela450NYC captured the scene below.

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