Tenacious D

Tenacious D began in earnest as an HBO series produced by comic David Cross, and in 2001 — the year Jack Black and Kyle Gass graced the pages of Rolling Stone — their self-titled debut album came out, boasting cameos by Dave Grohl and Page McConnell. The duo continued to make music as Black's Hollywood star continued to rise, and this year they'll headline San Francisco's Outside Lands festival.