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Kristin Cavallari has all the reason in the world to smile ... she's got money, killer looks and she's single! What more can a girl ask for?

The former Hills hottie, wearing skinny white pants, a sheer grey sweater and adorable platform sandals, hit the shops in Beverly Hills looking fresh as a daisy.

Last month, Kristin, 24, and Chicago Bears quarterback Jay Cutler, 28, ended their engagement. Doesn't look like Kristin is sitting at home crying over it. We wouldn't be either.