Jack Black. Funny guy. Movie star. And … natural-born rock ‘n’ roll animal. Born in Santa Monica, California, on this day in 1969, the star of “School of Rock” is also the frontman of Tenacious D, his satiric rock power duo with Kyle Gass. Black brings a manic intensity to his music, as seen in guest performances with the Foo Fighters (“Back in Black” and Led Zep’s “The Immigrant Song”) and on “American Idol.” Plus, who else does a medley that shifts from “Three Times a Lady” to “War Pigs”?