The cameo wasn't even the most notable part of last night's show: McCartney performed his solo track "Temporary Secretary" live for the first time.
It seems Foo Fighters might love Taylor Swift as much as the Billboard Music Awards does.
The music industry and fans alike have been gloating over the Foo Fighters pretty much since their formation more than 20 years ago.
It's hard to believe -- and we're doing everything we can to not accept reality -- but David Letterman has officially retired.
If you only know one Foo Fighters song, it almost certainly comes from The Colour and the Shape.
First it was Eddie Vedder. Then it was Bob Dylan.
Dave Grohl was the Record Store Day Ambassador for 2015, and his schedule was packed, but his reign culminated in an intimate Foo Fighters performance.
Watch Foo Fighters surprise everyone by playing a rowdy set of classic rock covers at a California county fair.
Record Store Day ambassador Dave Grohl certainly delivered for this year's event.
The group performed an intimate show for 150 fans at a local record store just miles from Dave Grohl's hometown.