Heidi Klum plans a birthday

Heidi Klum takes her kids for a shopping trip at The Grove in Los Angeles.
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The 37-year-old model, who recently announced she was retiring as a Victoria's Secret Angel, picked up a few items from the stores and also treated daughter Leni, 6, and sons Henry, 5, and Johan, 3, to some balloons.
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Heidi's tiny tot Lou, whom she pushed around in a stroller, turns 1 this Saturday.