Who is Leona Lewis?

i love the her song bleeding love not until it became like a national anthem.. grrr.. always heard it on the radio.. its everywhere!

She won a Talent show which featuerd Simon Cowell, Sharon Osbourne and Louis... i forgot his last name... Anyway the show was is here in the UK and called X Factor. Its boviusly for singing, and she won it last. I persoanlly cant stand the song, it used to be on the radio all the time, and there was a faze where ppl wnet kinda mad for it.