Singer Cat Stevens, who changed his name to Yusuf Islam, was refused entry into the United States in 2009 after U.S. Homeland Security placed the singer on Washington's no-fly list for having suspected ties to terrorists. "Yusuf Islam has been placed on the watch lists because of activities that could potentially be related to terrorism," government spokesman Brian Doyle said in a statement to the Associated Press. "It's a serious matter." —XFINITY Entertainment Staff (Photo by Brendon Thorne/Getty Images)
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