I'm a fan (and you should be, too) because...
Jordin Sparks' songs are awesome, and they speak out to me and a lot of other people. You get the superficial songs, like SOS (Let The Music Play) and then the deeper more meaningful songs like Worth The Wait (which annoyed me, because it wasn't released as a single). Not all of her songs are centred around love, though. One Step At A Time is more about life. 
She's my singing inspiration, and my role model, because she doesn't go for the slut look most celebrities do. Plus, she wears a purity ring ^^