Jack Black Confirms His Hard Rock Cover of Britney Spears' '...Baby One More Time' Appears in Kung Fu Panda 4 “Yeah. So, people don't know ... I don't even know if I'm allowed to say.

Araya Doheny/WireImage Jack Black is opening up about his hard rock rendition of Britney Spears’ 1998 song “...Baby One More Time.” Speaking at the Kung Fu Panda 4 premiere in Los Angeles on ...

in which Tenacious D (a.k.a., Black and long-time collaborator Kyle Gass) bust out an extremely bearded cover of Britney Spears’ “…Baby One More Time” for the soundtrack of Kung Fu Panda 4 ...