Mary J. Blige says she learned the hard way how important it is to understand her finances

Mary J. Blige said her mother signed her music contract on the washing machine. Rodin Eckenroth/GA/The Hollywood Reporter via Getty Images Mary J. Blige said she entered the music industry knowing little about the business side. She said people around her benefited from her lack of financial knowledge early in her career. She has since learned from the experience and isn't afraid to ask questions or seek help. Mary J. Blige said her early success came with a steep learning curve when it came…