With a familiar high-pitched voice counting off one-two-three-four, a new Michael Jackson single debuted online Monday, prompting a hasty response from the singer’s estate after Paul Anka revealed he was the song’s co-writer. “This Is It” is featured on the soundtrack to the upcoming documentary featuring the late superstar, but its genesis was actually in 1983 when it was written for a duets album Anka was recording. The song was titled “I Never Heard,” and Jackson and Anka are credited as