LOS ANGELES, Feb 7 (Reuters) - R&B star Mary J. Blige was hit with a lawsuit on Thursday alleging the Grammy-winning singer had defaulted on a $500,000 loan - the second such legal action against her in three months. According to the lawsuit filed by Bank of America in New York State Supreme Court, Blige took out the loan in 2005 and stopped making re-payments in June 2012.