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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Cee-Lo Green says The Lady Killer is the work of "a young man with an old soul." Fabrice Coffrini/Getty Images hide caption

itoggle caption Fabrice Coffrini/Getty Images