Hot alert! Celebs share bikini snaps

Hot alert! Celebs share bikini snaps
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After months of sweaters, boots and beanies, bikini season is officially here -- and we have the snaps to prove it.

Stars from Alessandra Ambrosio and Michelle Monaghan to Bella Thorne and Reese Witherspoon are gracing Instagram with pics by the pool, on the beach and more.

Get in the mood for summer with celeb bikini snaps above.

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