Look back on 20 years of Time magazine's Person of the Year.
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Time has named President Barack Obama its Person of the Year for 2012, citing his reelection in November despite high unemployment and other national problems. Look back on 20 years of Person of the Year winners.
With Cher celebrating her 67th birthday on May 20, join us as we turn back time to see the legendary singer and actress' life and career through the years.