Feigned
Part of speech: verb
Definition: To make a false show or pretence of; to counterfeit or simulate.
Part of speech: adjective
Definition: Pertaining to a pretense, a counterfeit, or something false or fraudulent.
Insincere
Part of speech: adjective
Definition: not sincerenot serious
Example sentence: If I find myself just not feeling like writing songs anymore, I think I'll drop it. There's enough bad, insincere music out there. I don't need to contribute to that.