When singer and actress Ami Suzuki appears in the TBS drama “Love Letter” this month, she’ll finally realize the end of a remarkable comeback. The toast of 1999, when she sold 3.2 million CDs as a 16-year-old electro-pop princess, her fall from grace was infamous. As she attempted to distance herself from her management company, which had been implicated in a fraud scandal, the music business responded by blacklisting her. After years fighting against the very industry that made her a star, she now celebrates her re-emergence as a singer with a 10th-anniversary album, “Supreme Show,” while maintaining an acting career that she sees as crucial to her future.