Will Beats By Dr. Dre Follow Spotify Toward An IPO?

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Of hip-hop’s five wealthiest artists, Andre “Dr. Dre” Young’s fortune is growing the fastest, soaring nearly 60% to $550 million over the past year. The boost came almost entirely from Beats By Dr. Dre, which he cofounded with Interscope chief Jimmy Iovine in 2008—and an even bigger payday could be in the offing.

Last month, Beats announced the appointment of chief financial officer An De...