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Move over, John Mayer hair. You’re not the only coiffure change we have to discuss today: Jessica Alba debuted a new blond ‘do over the weekend.

The 31-year-old mother of two is currently in preparation for her role as stripper Nancy Callahan in the highly anticipated sequel to Sin City (2005).

Check out Jessica Alba’s new look below:

It looks like blondes really do have more fun, at least according to her Tweets about the transformation, filling everybody in on the process.

“Bye Bye Brown Hair r u on viddy yet? I’m documenting my brown to Sin City blonde!” she tweeted on Thursday, while still a brunette.

She followed that up with “Stage 1 – okay it doesn’t look that different but it’s a process” followed by “Stage 2 of #SinCity2 Nancy hair.”

An hour later, she unveiled the final product, even noting how the look stays true to her roots (literally): “She got roots that Nancy #sincity2.”

What do you think of Jessica Alba as a blonde?