The Beatles reunited last night on stage in London

Last night at London's O2 Arena, Paul McCartney closed out his "Got Back" tour by calling out an old friend to play the skins. Ringo Starr joined McCartney for a rousing medley of songs by the Beatles who broke up 55 years ago. Watch below.

"Should we rock? Get on your kit la," McCartney said.

Another evening surprise: Rolling Stones guitarist Ronnie Wood joined McCartney on "Get Back."