Singing?

I have a band at the moment and we are getting a place to rehearse for a few months and we don't have a vocalist. So I said I'll give it a shot, but I'm not even sure I can sing and I don't want to embarrass myself. I've taken a look at musical scales and practiced with them a little, but I don't think that's going to improve me drastically. Is there any way to get alright at singing within a week? Just so we have some lyrics to go with.

Probably not. I'm guessing Its like any other skill, i.e. it will take a lot longer than a week to get good at something.

Just fucking go for it man. As my boy Chris Rock said, "If the beat's alright, she'll dance all night!"
 
Make sure you play well and the song is well written. Vocals don't matter if everything else is good.

If it's a metal band than you're probably already overqualified.

As the saying goes, those who can't play sing, and those who can't sing play bass.

Like beards, and loss of hair, you either have it or you don't. 

• Don't be afraid to belt out and sing loudly. Nothing is worse than singers that quietly mumble their way through songs.
• Exaggerate the pronounciation of every word when you sing. It might not seem like a big thing to yourself but others will definitely hear it and appreciate it.
• Record yourself singing. If you've never heard your own voice before you'll be shocked by how you sound to everyone else (most probably in a negative way too, so be forewarned)
• Be prepared to take a lot of criticism unless you happen to be naturally talented at it.

If you find you suck at singing and want to get better I recommend picking up Roger Love's Set Your Voice Free. As cheesy as it sounds, the vocal exercises and techniques in there helped me improve my singing quite a bit (I'm not exactly a natural).

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