it depends on the song. There are some chorus songs I couldn't care if I *ever* learn the words or the tune for. Others I appreciate when I hear sung - but have no desire to sing. then there are the onesx I want to learn - those I usually listen to and pick up as I am able - usually going for the tune primarily but working on the words as I am able.

The only time I "fake it" is when I am performing as a street character - and then only if it is a mass sing and not obvious I'm not actually singing.