Lifestyle Style Jessica Biel Just Went 'Really Blonde' and Her Husband Justin Timberlake Had the Best Reaction! "I have been slowly taking Jessica Biel lighter, but last night she wanted to go really blonde!" celeb colorist Tracey Cunningham said By Karen Mizoguchi Published on February 7, 2018 07:50PM EST Jessica Biel just revealed her new cut and color! The actress, 35, debuted her blonde ‘do on Tuesday at the 2018 Makers Conference at the Hollywood Roosevelt Hotel in Los Angeles, and her husband Justin Timberlake had the best comment about his wife’s latest hair transformation. “My boo thang looks goooood!” the Super Bowl LII Halftime show headliner, 37, wrote on Instagram Tuesday. Biel’s go-to hairstylist Adir Abergel and colorist Tracey Cunningham shared all the details behind her trim and lighter locks with Cunningham even sharing a before and after video of the color change to the tune of Timberlake’s new song “Montana” off his Man of the Woods album. Looking for more style content? Click here to subscribe to the PeopleStyle Newsletter for amazing shopping discounts, can’t-live-without beauty products and more. Getty (2) “I have been slowly taking @jessicabiel lighter, but last night she wanted to go really blonde!” Cunningham said on Instagram Wednesday, adding that the whole balayage process of turning Biel’s brunette tresses to blonde took her 75 minutes. Justin Timberlake Wants to Have ‘As Many Kids’ as He Can with Wife Jessica Biel RELATED GALLERY: The Sweetest Things Jessica Biel & Justin Timberlake Have Ever Said About Each Other Go Behind-The-Scenes of Jessica Biel’s Glam RELATED VIDEO: Justin Timberlake Dances with Wife Jessica Biel in New Music Video ‘Man of the Woods’ Biel and Cunningham have been putting in highlights since September, one year after The Sinner star got bangs courtesy of Abergel, who also calls Saorise Ronan, Kristen Stewart and Reese Witherspoon as clients. Cunningham is also no stranger to celebrity hair. She colors the manes of Khloé Kardashian, Jennifer Lopez and Emma Stone just to name a few. What do you think of Biel’s new hair? Sound off in the comments below!