Lexie Grey recently decided to go blonde, prompting Mark to tell her she can't pull it off because she's neither bad ass nor super fun. Will Izzie Stevens attempt the reverse?

We're just speculating here, but based on recent photos of Katherine Heigl, crazier guesses have been posited. The Grey's Anatomy star has ditched her iconic blonde hair!

Heigl stepped out for lunch yesterday in L.A. as a brunette, a striking change from one of the industry's most noteworthy long-haired blondes (Blake Lively being another).

Do you think Izzie will adopt Katherine's new change? Regardless, which hair color do you like best on Katherine? Check out the comparison below and tell us what you think:

Can Katherine Heigl pull off her newly-brunette look?

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.