READ MORE: Britney Spears Considers Herself a ‘Girl Who Used to Be Famous’ Black shared a video of himself and Gass rocking out to their cover of Spears’ song on Instagram last Thursday (Feb.

Some commonly shared sentiments were: “I demand a full Tenacious D album of Britney Spears covers”, “Best version of the song”, “Cover album please”, and “WHERE IS THE FULL SONG????” ...