Celebrity colorist Bianca Hillier, a.k.a., the queen of balayage, told ET why she's looking to the Olsen Twins for hair inspo ...

Related: The Unofficial Guide to Mary-Kate and Ashley Olsen's Hair Evolution Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to ...

I 'Don't Compete' with Their 'Partnership' Mary-Kate and Ashley Olsen's Hairstylist Reveals Secret to the Sisters' Signature Waves and How Their Hair Differs Mary-Kate and Ashley Olsen's The Row ...

Get to know the six Olsen siblings: Mary-Kate, Ashley, Elizabeth ... he briefly discussed what it was like growing up as one of six siblings. "Growing up in our house was always interesting ...

Mark-Kate and Ashley Olsen are, fashionably speaking, known for two things: good style and good hair. For decades ... Never miss a story — sign up for PEOPLE's free daily newsletter to stay ...