No, she didn't. she only wrote big girls don't cry..
As far as I know The Dream wrote: "Bed"~J Holiday, "Umbrella"~ Riannah(excuse the spelling).And many of his songs.
She didnt in the beginning (For her 1st album) and then she her 2nd one (meet miley cyrus) she wrote most of them and now she pretty much all her songs now or sometimes she co-writes them.
He co-wrote Single Ladies (put a ring on it) for Beyonce
perhaps