Macy Gray is changing her tune. A day after the Grammy Award-winning singer said she’s been a long-time supporter of the transgender community, she is now telling her critics to “fk off.” For the last few days, the “I Try” singer has been criticized on social media for comments on transgender issues she made during an interview with Piers Morgan on Monday’s episode of TalkTV’s “Piers Morgan Uncensored.” On Tuesday, Gray clarified her position, saying in a statement that her words had been misunderstood and that she has been a long-time supporter of the transgender community. She also tweeted h…