FILE - In this Feb. 4, 2007 file photo, Prince performs during halftime of the Super Bowl XLI football game in Miami. Minnesota prosecutors are planning an announcement Thursday, April 19, 2018, in their two-year investigation into Prince's death. Prince was found alone and unresponsive in an elevator at his Paisley Park estate on April 21, 2016. An autopsy found he died of an accidental overdose of fentanyl, a synthetic opioid 50 times more powerful than heroin. (AP Photo/Chris O'Meara, File)
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