Campbell's Fleetwood Mac bandmate Neil Finn also joined the pair in a Tacoma, Washington bathroom.
LaVarr Ball, Ella Mai, and a space cat without a face rounded out the evening.
Jenna Fischer, Ed Helms, and Ellie Kemper all made their case to Carell -- as did his wife and kids.
Lil Pump finished the concert outside, on top of a tour bus.
"For me, I have a spiritual belief of there is a god. Do I believe there’s a hell? No."
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