SHINee's Key is a sweetheart! Not only does he go around listening to YouTube covers of his label mate group f(x)'s new song, '4 Walls,' but he also knows how to publicize a particularly good one because he appreciates talent!

TheRealDavidKim posted an awesome cover of the song from earlier this month, but Key discovered it recently and posted a screenshot onto his Instagram so all fans of the song could listen to this version and appreciate it!  He even writes, "wow the best cover."

It's definitely a great cover with TheRealDavidKim's own personal flair - so listen above! He also covered other great K-Pop songs like iKON's "My Type" and Twice's "Like OOH-AHH."

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wow the best cover #fx #4walls #loveyoufx

A photo posted by ??? (@bumkeyk) on Nov 4, 2015 at 8:05am PST