Florence's is technically 66 for the MTV unplugged, but that really doesn't (and shouldn't count), and even with that really low score her average is still high (73).
but forgetting that, her "worst reviewed" album is Ceremonials, 75. still clocking most people's faves (Lungs being 79).
so proud of my girl
and my other fave's, OneRepublic, lowest is 61 for Native, but they never get the recognition they deserve.