I've played bass for about 15 years. Just now getting into singing backups. I'm currently playing in a rock cover band (Bon Jovi, ACDC, Journey, etc). The lead singer keeps telling me that I'm singing 'her' line rather than harmonizing. This may be true but it doesn't neccesarily sound bad because obviously our voices are different tones. It just doesn't make sense to harmonize every backing vocal. Opinions?