Kate Middleton and Prince William have been pretty out of the spotlight lately thanks to the summer holidays, with Kate's last official appearance being back in mid-July. But she and William were just papped heading to church in Balmoral with their kids, and Kate seemingly debuted brand new blonde hair.

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For comparison, here's Kate's hair vibe at Wimbledon back on July 15.

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Soooo, did Kate take the plunge after years of being a brunette and dye her hair blonde? Maybe, but the Daily Mail spoke to an expert who thinks Kate's hair was mostly lightened by the sun during her lengthy vacation in Greece.

"After a sun-soaked holiday in Greece, Kate returned not only with a refreshed spirit but also with naturally lightene

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