Herb Alpert (left) and Jerry Moss, who founded A&M Records in Alpert's garage in 1962. Courtesy of A&M Records hide caption

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Nickelback's Chad Kroeger performs during halftime of a Canadian football game in Vancouver. On the band's own tours, expensive pyrotechnics are more rare. Jeff Vinnick/Getty Images hide caption

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Mumford & Sons is led by singer Marcus Mumford (second from left). The band's second album, Babel, was released on Sept. 25 and is on pace to be the highest-selling debut of 2012. Courtesy of the artist hide caption

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Bob Dylan performs on stage during the 21st edition of the Vieilles Charrues music festival on July 22, in Carhaix-Plouguer, western France. Fred Tanneau/AFP/Getty Images hide caption

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Lighting director Jackie Finney runs the light show during concerts for the band fun. Mito Habe-Evans/NPR hide caption

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Members of the feminist punk band Pussy Riot, Nadezha Tolokonnikova (left), Yekaterina Samutsevich (center) and Maria Alyokhina, at a hearing in Moscow court on Monday. Andrey Smirnov/Getty Images hide caption

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Nils Lofgren, Bruce Springsteen and Stevie Van Zandt performing in Paris earlier this month. David Wolff-Patrick/Redferns via Getty Images hide caption

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The Grateful Dead circa 1970. The band's members were quintessential rock hippies — but, a new exhibit reveals, savvy businessmen as well. Gems/Redferns hide caption

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In 1969, Plant and See, a band led by the late Lumbee Indian singer Willie Lowery (second from left), made its only album, a cult classic rereleased this month. Courtesy of the artist hide caption

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The singer and songwriter Frank Ocean, whose first full-length studio album, Channel Orange, was released on iTunes this week. Nabil Elderkin/Courtesy of the artist hide caption

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