Seems like only yesterday a 16-year-old Jamie Lynn Spears announced she was pregnant.

But today, her daughter Maddie with Casey Aldridge, celebrates her 5th birthday. Time definitely flies!

Britney's sister shared a photo of the b-day girl today on her Instagram, where she's seen wearing a pair of cute pink Dolce & Gabbana shoes (right).

Since giving birth to Maddie, Jamie Lynn has kept a relatively low profile, leaving the entertainment business to focus on her family.

Recently, she's been working on a new music career and got engaged to Jamie Watson back in March.

The proud mom posts a ton of photos of her and her daughter online -- see some of our faves above!

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