NEWARK, New Jersey (Reuters) - Grammy-winning singer Lauryn Hill pleaded guilty in federal court in Newark, New Jersey, on Friday to three counts of failing to file federal income tax returns. Hill, 37, a hip hop singer and rapper best known as a member of the Fugees and for a Grammy-winning 1998 solo album, pleaded guilty to failing to file federal returns between 2005 and 2007, despite an income of more than $1.8 million primarily from film and recording royalties. Her sentencing date was set for sometime in late November. She was released on $150,000 bail. ...