In what year was the album “睡皇后” released by G.E.M.?

In what year was the album “睡皇后” released by G.E.M.?: The album “睡皇后” was released in 2019 by G.E.M., featuring 3 tracks.
What is the most successful song from the album “睡皇后” by G.E.M.?: “WHY” is the biggest hit from the album “睡皇后” by G.E.M..

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