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Drake performs at Finsbury Park in London, England in June. Philadelphia rapper Meek Mill recently accused Drake of using ghostwriters, spurring the two to release diss tracks aimed at each other. John Phillips/Getty Images hide caption

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The members of ABBA (from left): Bjorn Ulvaeus, Agnetha Faltskog, Anni-Frid Lyngstad and Benny Andersson at Waterloo station in London in 1974, the year the group won the Eurovision contest with the song "Waterloo." John Downing/Getty Images hide caption

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