Gronk rocks out on stage with Paul McCartney

In the latest exploit in the Summer of Gronk, Rob Gronkowski added the title of "honorary Beatle" on Sunday night by joining Paul McCartney on stage at Fenway Park.

The New England Patriots tight end showed off his air guitar skills during a rendition of "Helter Skelter."

With training camp scheduled to start on July 27, this may be one of the last Gronk sightings we get until next offseason.