OK! Look of the Day: Beyoncé at the 40/40 Club 10 Year Anniversary

Bey was her usual flawless self last night at the 40/40 Club 10 Year Anniversary Party. Mrs. Carter choose this white knit Roberto Cavalli hotness for her hubby's soirée and stunned.

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After I take a second to point out that those cut outs are working on every level, I would also just like to say, I'm obsessed with Beyonce's super-straight strands here. Love when she does this look—so gorge!

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What do you think of B's dress and sleek 'do? Are you a fan? Sound off in the comments below or on Twitter @OKMagazine.

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