How Can I Get My Hair to Look Like Jessica Biel's?

How or what colors do I need to dye my hair, or do I need highlights or color placements, for Jessica Biel's hair color in this photo:

http://www.google.com/imgres?imgurl=http://www.handbag.com/cm/handbaguk/images/Mg/or_b201373412802231271793.jpg&imgrefurl=http://www.handbag.com/hair/celebrity/hairstyle/celebrity-hairstyle-of-the-day-july-114301&usg=__gGNQ20fPHc-n2JRoi7xBPM3zan4=&h=500&w=375&sz=45&hl=en&start=46&sig2=AtY4aJVsow3KgB_mkoqlZQ&zoom=1&tbnid=5zIpsOzKEUUyDM:&tbnh=151&tbnw=115&ei=FXG-TLO5MoyCsQOS9vmADQ&prev=/images%3Fq%3Djessica%2Bbiel%2Bdark%2Bhair%26um%3D1%26hl%3Den%26safe%3Dactive%26client%3Dfirefox-a%26sa%3DN%26rls%3Dorg.mozilla:en-US:official%26biw%3D1280%26bih%3D620%26tbs%3Disch:10%2C1197&um=1&itbs=1&iact=hc&vpx=706&vpy=205&dur=617&hovh=259&hovw=194&tx=111&ty=145&oei=BHG-TJ3ZLpPGsAOvnYiYDA&esq=3&page=3&ndsp=23&ved=1t:429,r:19,s:46&biw=1280&bih=620

Suggestion:

Twitter Jessica or contact her hair stylist.