I don't know what's so HUGE about slapping some texturizer in your hair which looks exactly like what Craig David did. I have seen his hair in videos and photos and it was a lot tighter curl where the ends of that look almost straight.

If your hair has a definite curl pattern (not everyone does) then if you learn to keep it properly moisturized it should curl up.
"A life without fame can be a good life, but fame without a life is no life at all." - Clive Davis