Popsugar Fashion Celebrity Style Reese Witherspoon's Best Red Carpet Looks 63 Reasons Why We Love Reese Witherspoon's Classic Red Carpet Style March 22, 2014 by Mandi Villa View On One Page Photo 37 of 63 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 37 Reese Witherspoon in Zac Posen at 2010 How Do You Know LA Premiere For the LA premiere of How Do You Know in December 2010, Reese looked ultrasexy in a strapless Zac Posen dress. Previous Next Start Slideshow Reese WitherspoonRed CarpetCelebrity Evolutions