Do i have to bleach my hair to go blonde?

i have naturally light sandy/ginger hair and i have spoken previously to my hair dresser about going blonde and she said she didnt think i would need to bleach it ... i want to dye it my self but will it work ? i want to go this colourhttp://www.google.co.uk/imgres?imgurl=http://static.becomegorgeous.com/img/arts/2010/Mar/18/1908/blakelivelyhairstyles_longsculptedcurlshairstyle.jpg&imgrefurl=http://www.hair.becomegorgeous.com/newest_trends/honey_and_caramel_blonde_hairstyles-1908.html&usg=__lckqEwXVz0zBkBJ72-WZXOPvK8Q=&h=354&w=266&sz=73&hl=en&start=0&zoom=1&tbnid=6_-oOPTxAF62aM:&tbnh=166&tbnw=119&ei=o6P8TYuCNI3G-Qaq5JTsAw&prev=/search%3Fq%3Dcaramel%2Bblonde%26um%3D1%26hl%3Den%26biw%3D1366%26bih%3D667%26tbm%3Disch&um=1&itbs=1&iact=rc&dur=373&page=1&ndsp=21&ved=1t:429,r:1,s:0&tx=83&ty=103&biw=1366&bih=667