Jamie Lynn Spears and Daughter Maddie Sport Matching Pink Bikinis for ‘Pool Day’ (PHOTO)

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It was a mother-daughter Memorial Day for Jamie Lynn Spears and Maddie Briann Aldridge. Posing in adorable matching pink bikinis poolside on Monday, the former Nickelodeon star couldn’t help but share some Instagram family photos.

The younger sister to Britney Spears tweeted a series of hash tags including: #poolside, #littlemoments and #littlegirls.  Now age 21, Jamie shocked the media when she announced she was pregnant at 16 back in 2007.

The Zoey 101 star — who later split from Maddie’s father Casey Aldridge in 2010 — has since spoken out about being a mom and an aunt to Britney’s boys, Preston, 6, and Jayden James, 5. She told Glamour this past February,

“[The kids are] very close. They’re like brothers and sister. They’re so stinking cute. And Maddie loves her Aunt Britney’s songs. She just loves the whole dress-up thing that goes with it. She loves dancing and singing and all of that. I definitely think music is in her genes.”

Jamie Lynn isn’t the only hot mom in Hollywood. Check out bikini-clad celebrity parents in the gallery above, and for more beach babies, check out the gallery below: