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Tracey Cunningham is the celebrity colorist behind many A-list hair transformations.

Photo: Getty Images
Remember that time Kim Kardashian went blonde?
Emma Stone
Emma was blonde, I dont know, about two or three weeks ago?
She texted me the day after she didSaturday Night Liveand said she wanted to go red.
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Shes liking her hair dark, so were just going to gloss it to add shine.
Carey Mulligan
I took Carey Mulligan very blondethis winter has been all about blondes!
Everyone has gone blonde.
Photo: Getty Images
Photo: Getty Images