From The A.V. Club.

GWAR cover "I’m Just Ken" (from ‘Barbie The Album’) by Ryan Gosling
Recorded at Second Take Sound in midtown Manhattan https://www.secondtakesound.com/

The Berserker Blóthar – Vocals
BälSäc the Jaws ‘o Death – Guitar and Keys
Beefcake the Mighty – Bass Guitar
JiZMak da Gusha – Drums
Grodius Maximus – Guitar

Brad Wagner – Director
Juan Soria – Audio Engineer
Reed Turchi – Audio Engineer
Charlie Peterson – Camera Operator
Bobby Phillips – Audio Mixer