Who is the best female singer?

Hey there.. ok today was a shoking day because I talked to my first boyfriend and that was just random.. he said hi to me on msn... LOL! so weird.. anyway!.. as you can see.. I have a poll on my blog.. so you can vote for your favorite singer.. and the one who wins.. will have an special post with all her information and lots of pics.. Vote for one of them... SHAKIRA, ASHANTI, MADONNA, BRITNEY, BEYONCE AND RIHANNA