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Hello, sunshine! Giuliana Rancic, who dyed her hair blonde last week, eagerly posted numerous updates with her lighter locks on Instagram over the weekend.

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"As I like to say...go big or go home," Rancic, 39, wrote Friday, July 18, alongside a snap of her blonde bob concealed partially beneath a black baseball cap.

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Rancic hinted at her beauty transformation on Instagram Thursday, when she shared an update from inside a salon. "Hope it's true what they say," the reality TV star wrote beside a photo of someone's blonde hair coated with foil packets. "#BlondesHaveMoreFun #BlondeAmbitionTour2014 #NoFilter."

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Rancic's latest beauty move is a hefty contrast from her staple chestnut-color hair, which she ditched without transition. "It's not kinda blond or sorta blond...it's straight up blond!" the mother of one wrote Monday, July 21. "#closerlook #nofilter #goblondorgohome color by: @colorbyyvonne."

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