 Heidi Klum wears peekaboo thong before 50th birthday.

Heidi Klum is leaving little to the imagination as she approaches her fiftieth birthday.

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Klum showed off her physique in a yellow bikini while relaxing in the sun on Monday.

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"Finally some sunshine," she captioned a series of photos that had Klum sniffing a dandelion.

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"This type of low-impact exercise is much better for my joints than treadmill running," Klum told Women's Health UK.

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"I've relished the opportunity to spend more time at home with my family in recent months," she explained.

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[{"selector":"#anim-8d229b3b-1fa0-44cd-ac5a-100b18b1d847","keyframes":{"opacity":[0,1]},"delay":100,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-5ffecb6d-eeba-4f14-8377-18f1a816dc86","keyframes":{"transform":["translate3d(0px, 179.71382%, 0)","translate3d(0px, 0px, 0)"]},"delay":100,"duration":2000,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] "Being able to enjoy getting stuck into domestic tasks because I've been on a plane and in the studio a lot less means I've been able to enjoy getting stuck into domestic tasks."

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