[INST] I really don't want to go to the chorus perfomance.  The chorus sucks. [/INST]That sounds like a great reason for not going.  That’s a valid reason.  How about you don’t have to go if you really don’t want to?</s>[INST] I know!  My mom wants me to go, but I really don't want to.  They sound awful. [/INST]
It sounds like you're in a tough spot. Have you considered discussing your feelings about this with your mom? Perhaps you can come up with a solution together.
It sounds like you have two valid reasons for not going: one is your opinion, and the other is that your mom wants you to go.  It also sounds like you have some opinions about what your mom wants.  So I’d say it’s all pretty clear, right?