14 January 2010,
The adorable actress is our first ever Girl on Top winner, which means that the Chuck star is the favorite TV leading lady of E! Online readers around the world.

Yvonne defeated 127 other female TV stars overall over seven rounds of voting. Millions of votes were cast, and in the end, Yvonne's Chuck character, Sarah Walker, defeated Allison Mack's Chloe Sullivan from the CW's Smallville, 52 percent to 48 percent.

Well done Yvonne and 'Chuck' fans!