Jem Aswad Senior Music EditorSony Music and the estate of Michael Jackson will observe the 40 th anniversary of Michael Jackson’s classic “Thriller,” the biggest selling album of all time (by most metrics), with the November 18 release of “Thriller 40”: a double CD set comprised of the original album and a second disc “full of surprises for fans, including never-released tracks which were worked on by Michael for the ‘Thriller’ album,” according to the announcement, which comes on the heels of 10 Tony nominations for “MJ the Musical,” which features several songs from the album.During its 112th week on Billboard’s album chart, “Thriller” became the first title ever to be certified 20-times platinum by the RIAA (on October 30, 1984), became the first title ever to be certified more than 30-times platinum in 2015, and since has been certified at 34-times platinum.Seven tracks from the album became Top 10 singles, and three, “Beat It,” “Billie Jean,” and “Thriller,” went No. 1.