Let it be known: Jennifer Aniston gives full credit to Living Proof products for her good hair days. 

The actress and face of the brand, recently filmed the third promotional video for the company, this time spending some time in the lab to show off the scientific strategy behind the beauty brand.

"There's nothing more interesting than when you hear how something is broken down," she admits adorably. "It's like watching the Science channel...which I'm obsessed with. I love the Science channel!" 

With candid testimonials from the star's famous hairstylist Chris McMillan, Allure editor Kristin Perotta and the brand's brainy founders, this savvy video does a good job at documenting the effectiveness of its product line from different expert opinions.

But let's be honest: All we really care about is what Aniston thinks, right?

Justin Theroux's ladylove sums it up quite nicely, "I'm not a scientist. I'm just an actor and I know what it's been through. And I've had a good hair day every day...and I'm sold!" 

And well, so are we! So much so that we wanted to bring the celeb hair experience to you.

That's right, readers, there are some seriously fab prizes up for grabs!

First, submit your worst hair story on Living Proof's site by May 24, 2013 to enter to win a fun-filled pamper day (translation: free haircut!) with Jen and Chris, and then tweet at Living Proof with the hashtag #goodhairday for a chance to win one of five swag bags packed with products valued at $100. 

Go ahead, girls!

Good hair days are just around the corner.

Legal:  NO PURCHASE NECESSARY.  Void where prohibited. Open to US residents who are 18+. Ends 5/24/13 at 11pm PT. Limit 1 entry/day.  Sponsor: E! Entertainment Television, LLC.

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