How do i get my hair like this - In a very big high messy bun like diana vickers ?

How do i get my hair in a BIG HIGH messy bun ? Like Diana Vickers at the judges houses? It looks really cool but i dont have any products or curlers only hairspray , so how do i do it any youtube video tutorials? My hair is medium , blonde & is in between thick & thin? TELL ME! here is a pic i want it like - a href="http://www.google.com/imgres?imgurl=http://images.mirror.co.uk/upl/m4/sep2008/9/6/AA2DC0DD-A923-87D4-F394052FF2FD68A2.jpg&imgrefurl=http://www.mirror.co.uk/celebs/news/2008/09/29/in-pictures-x-factor-final-24-off-to-judges-houses-115875-20760070/&usg=__Lqiw_XXeRf8PordG1vdR8suk9ks=&h=400&w=284&sz=25&hl=en&start=0&zoom=1&tbnid=70Ov8BHjJWB1MM:&tbnh=157&tbnw=125&prev=/images%3Fq%3Ddiana%2Bvickers%2Bjudges%2Bhouses%26um%3D1%26hl%3Den%26client%3Dsafari%26sa%3DN%26rls%3Den%26biw%3D1280%26bih%3D605%26tbs%3Disch:1&um=1&itbs=1&iact=hc&vpx=499&vpy=62&dur=974&hovh=267&hovw=189&tx=120&ty=110&ei=yIb2TO3-DZOD4Qb63OnQBw&oei=yIb2TO3-DZOD4Qb63OnQBw&esq=1&page=1&ndsp=18&ved=1t:429,r:2,s:0" rel="nofollow"http://www.google.com/imgres?imgurl=http…/a