Jack Black, one half of the American comedy rock duo Tenacious D, says he no longer feels it is "appropriate" to continue the band's tour following a controversial joke by his bandmate Kyle Gass at the band's recent Sydney show.

<p>Jack Black, one half of the American comedy rock duo Tenacious D, says he no longer feels it is "appropriate" to continue the band's tour following a controversial joke by his bandmate Kyle Gass at the band's recent Sydney show.</p>

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