Where's Penny?!

When Kaley Cuoco showed up to the 4th Annual Critics' Choice Television Awards in LA Thursday night, onlookers had to give The Big Bang Theory star a double-take because she looked so different with her pixie 'do!

Which leads us to this fact: A haircut makes all the difference on basically anyone — and these stars are living proof.

Tell us which style you prefer on each star in comments!