[AKI]'s feed

Do you guys know any MANHWA idols or composer that actually uses real songs? like they use it for their debuts/practices? (I always get curious how the song goes whenever they put the lyrics lolol)

something similar to the MC of "The Guy She Was Interested in Wasn't a Guy At All" when she actually listen to songs from artists and actually sang (cover) a song for the FL?

I know it'll be hard to find some since it may pose as copyright or plagiarism.. (?)