In what year was the album “BACK TO BACK - Single” released by Da-iCE?

In what year was the album “BACK TO BACK - Single” released by Da-iCE?: The album “BACK TO BACK - Single” was released in 2019 by Da-iCE, featuring 4 tracks.
What is the most successful song from the album “BACK TO BACK - Single” by Da-iCE?: “Back To Back” is the biggest hit from the album “BACK TO BACK - Single” by Da-iCE.

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