It's hard to think of Reese Witherspoon ... she's experimented with hair length and even briefly flirted with shades of red or brown, Witherspoon's signature hairstyle is medium length and blonde ...

We'd forgive you if you said Reese Witherspoon ... hair look to match her milestone. She wowed with a classic bob that was an edgier and trendier hairstyle than her previous, just past shoulder ...