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Sandra Bullock
"The next big thing in hair color: Sandra Bullock's dark brown, espresso-colored hair. I think people are going to start going very dark again but with rich, vibrant tones. I've started to weave beautiful mochas into my brunettes to add dimension. I love Sandra's new dark look and I think over the next few months a lot of people will start requesting her color."—Joel Warren
Rosie Huntington-Whiteley
For a more seasonally appropriate blonde, go for a caramel shade.
Jessica Alba
Honey highlights are a great way to give brown hair some warmth and dimension.
Jennifer Lawrence
Light colors can work for anyone as long as the pieces closest to the face are dark.
Jessica Chastain
"She helped make red a really popular and sought-after color this past year."—Joel Warren
Jennifer Aniston
According to Warren, no matter what the season, Aniston's signature dirty blonde always tops the most-requested list.
Kate Hudson
Hudson is another A-list celeb whose trademark hair color never gets tiresome.