Heidi Klum doesn’t need much incentive to shed her bikini top. Just give her a warm sun, cool breeze and tropical isle or a magazine cover. In this case it’s the latter. Heidi marks Ocean Drive magazine’s 25 anniversary swim issue with a topless pose for the mag’s cover. But don’t get too excited. The 45-year-old German supermodel keeps her arms strategically placed to prevent even a hint of her boobs from showing. But just the thought is enough to send temperatures soaring.