[quote name='PaulWarning' timestamp='1425030802' post='2703070']
learn to sing yourself, seriously, have lessons if need be, practice at home by recording yourself and singing through headphones, I improved my singing loads by just doing open mics, most of it is just confidence
[/quote]
This ^^^
Unless you're actually tone deaf, anyone can learn to sing. The trouble is, few people seem to realise that learning to sing properly is about as easy as learning to play bass properly.
But a dedicated singer in most bands (and of course IMHO, YMMV, DILLIGAF, LOL, ETC) is a trouble-causing passenger with an ego the size of Jupiter.