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Singer Idina Menzel (center) and Frozen songwriters Bobby Lopez (left) and Kristen Anderson-Lopez pose with gold records in February. Since then, the movie's soundtrack has sold over 1.5 million more copies. Alberto E. Rodriguez/Getty Images for Disney hide caption

itoggle caption Alberto E. Rodriguez/Getty Images for Disney

Ed Sullivan smiles while standing with The Beatles on the set of his variety show on Feb. 9, 1964. Express Newspapers/Getty Images hide caption

itoggle caption Express Newspapers/Getty Images

The Oberheim DMX rose to popularity in the mid-1980s, one of the first commercial drum machines that came close to mimicking real drum sounds. Courtesy of Get On Down Publishing hide caption

itoggle caption Courtesy of Get On Down Publishing