Just when we thought they'd run out of top OST artists to recruit. We are once again proven wrong.

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So which top artist will lend their voice for 'Descendants of the Sun' Part. 8? K-ballad's monstrous trio, SG Wannabe!

It looks like SG Wannabe's track "By My Side," will highlight the heartbreaking romance between the supporting Jin Goo and Kim Ji Won couple.

The full OST drops March 31!