Rebecca Ferguson is being sued by her former management company for breach of contract.
The company claims it had a five-year deal with Rebecca which began in 2010, and has made public an email in which it claims she ended the agreement.
It reads: "I am really unhappy with how I have been treated by you over the last couple of months and how miserable I have become.
"The deterioration of my health has not been relevent (sic) to you until this week when it reached another low point.
"I have lost all faith and trust in you as managers so I have no option but to terminate our working relationship with immediate effect."
But Rebecca denies that interpretation of the email - explaining that she was not well when it was sent.
She issued a statement commenting on an article in the press this week about her health.
Digital Spy reported her as saying: "I have read the article and i am aware that it will be in the press this week ... to my fans all i want to say is i am happy i am well and i am focused on work .. for a long time i was not well but now i have never felt better and i am looking forward to all the amazing things i have coming up this year.
"I've lost many friends and many people around me fame comes with good and bad ... but one thing I've learned and that will never leave me what my mother always taught me nothings more important than love and keeping your heart right.
"My voice is a gift ... and its my choice what i do with it i came into this industry and ill leave this industry with a few things my dignity my honesty and my love for music.
"All i want to do is make music and write music ..when you come to fame everybody want a piece of you, your making money you've never made before and you have attention you have never had before ..i"m just a girl that has come from absolutely nothing.
"I know what its like to struggle and i know what its like to live good the most important thing is to surround myself with good people I'm now blessed with such an amazing set of people who i love and who love me."
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