Fleetwood Mac had performed a concert at Tacoma Dome, Washington over the weekend, home to Pearl Jam frontman, Eddie Vedder.
However, this session did not take place during Fleetwood Mac's concert or in any studios... the collaboration took place in the most unlikely location of a bathroom.
As part of Campbell's latest Instagram series titled "Bathroom Jams", he posts short clips of himself and sometimes guests, jamming in backstage bathrooms.
Watch his latest "Bathroom Jams Volume 15" featuring Finn and Vedder below.
"See you in the next city in the next bathroom of the USA," says Campbell. We definitely are looking forward to more "Bathroom Jams".
See his past bathroom jams below.