Recently, a contest was held to write lyrics to the classic theme from The X-Files by Mark Snow. 33 cast and crew subsequently got together (virtually) to perform the winning entry.
Cast members such as David Duchovny, Annabeth Gish, Robert Patrick, Mitch Pileggi and William B Davis all joined in, along with series creator Chris Carter, Snow and many others. Gillian Anderson also pops up briefly.
The whole thing happened to raise money for charity World Central Kitchen, and is a good bit of fun.
…and if you enjoyed that, here are some bloopers…