Top row, left to right: Laura Marling, Lorde, Mike Milosh of Rhye; middle row: Ty Segall, James Blake, Valerie June; bottom row: Khaela Maricich and Melissa Dyne of The Blow, Earl Sweatshirt, Lou Reed. Courtesy of the artists hide caption

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Top row, left to right: Laura Marling, Valerie June, Mike Milosh of Rhye; bottom row: Ty Segall, James Blake, Earl Sweatshirt. Courtesy of the artists hide caption

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Paul McCartney. Mary McCartney/Courtesy of the artist hide caption

itoggle caption Mary McCartney/Courtesy of the artist

Paul McCartney's latest album, New, is out now. Mary McCartney/Courtesy of the artist hide caption

itoggle caption Mary McCartney/Courtesy of the artist

Clockwise from upper left: Paul McCartney, King Khan & The Shrines, Moby, Tim Hecker. Courtesy of the artists hide caption

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Paul McCartney. Courtesy of the artist hide caption

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Carrie Brownstein and Fred Armisen, both veteran musicians, are the stars of the IFC comedy series Portlandia. Chris Hornbecker/IFC hide caption

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The Beatles, left to right: Paul McCartney, George Harrison, Ringo Starr, producer George Martin, John Lennon.

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Clockwise from left: Paul McCartney circa 1970, Jeff Tweedy of Wilco, Gillian Welch. Courtesy of the artists hide caption

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Rave On Buddy Holly, a tribute to the rock 'n' roll pioneer, features Holly covers by Paul McCartney, The Black Keys, Patti Smith and many more. The album comes out June 28. Hulton Archive/Getty Images hide caption

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President Barack Obama presents Paul McCartney with the Gershwin Prize for Popular Song at the White House on June 2. Yuri Gripas/AFP/Getty Images hide caption

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