In what year was the album “OL” released by Hayki?

In what year was the album “OL” released by Hayki?: The album “OL” was released in 2018 by Hayki, featuring 12 tracks.
What is the most successful song from the album “OL” by Hayki?: “Nefes” is the biggest hit from the album “OL” by Hayki.

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