Rob Gronkowski joins Paul McCartney on stage at Fenway Park

Rob Gronkowski is a singing and dancing machine, but you already knew that. Paul McCartney apparently knew that, too.

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Rob Gronkowski is a singing and dancing machine, but you already knew that. Paul McCartney apparently knew that, too.

The rock legend invited the part-time partying legend on stage at Fenway Park Sunday night to perform "Helter Skelter." It was magical.

[youtube:https://twitter.com/mkarolian/status/75486874097880268]

That is one phenomenal air guitar.

- Kenny Ducey