Do you think we need more karaoke songs for sims?

Yes

but id also want my sims to be able to sing same songs in karaoke and when they are singing with no music or while playing piano

also some more fancy songs would be nice (you know those overdramatic musical and opera songs)

and sims to sing together even with no karaoke machine like we got holiday songs but that is about it I want my sims to sing a fancy duet