While Britney's sons were dressed in matching swimming trunks and arm bands, Maddie looked cute in a fuchsia bikini.
Redhead goth xxx Britney, 27, had been regularly flaunting her honed physique on stage and in bikinis in recent months, the more low-key Jamie Lynn, 18, is rarely photographed.
Britney Spears and her younger sister Jamie Lynn wore eye-catching bikinis for a day by the pool in Miami on Monday.
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Britney and her sons Sean Preston, three, and Jayden James, two, gay senior pics in the pool with Jamie and her month-old daughter Maddie.
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Jamie Lynn takes a picture of her sister and oldest son Sean Preston in the jacuzzi.
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