She apparently gets a lot of help from Brian Higgins and Miranda Cooper, the guys who wrote all the Girls Aloud songs, some Suga Babes stuff, and Believe by Cher amoungst other things.
Not to take anything away from GC though, that voice is incredible, I'm sure songs that are all her own maybe just aren't so radio-friendly (by no means a criticism).
She reminds me alittle of Amy Winehouse... what do you think ??