Los Angeles, California - Britney Spears celebrated her sons Jayden and Sean Preston's separate birthdays with rare throwback snaps!

Over the weekend, the Gimme More singer took a trip down memory lane in honor of Jayden and Sean's birthdays, which are two days apart.

In her first post, Britney shared an old and recent pic of her youngest son and sweetly dished in the caption, "Happy birthday to my handsome young boy oh dear lord we have this beautiful thing called life in front of us."

She continued, "It's such a beautiful delicate thing. I hope I can be the best mommy in the world every day of ur life!!!!"

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Britney wished her eldest son in another post, which featured Jayden and Sean, writing, "Happy early B-day to u as well...please stop working out so much because your muscles r starting to scare me ….JK!"

The Toxic hitmaker added, "Well I'm so proud of the young man you have become. P.S. This was in London, strolling in the park….Preston absolutely loved London!!!

Britney previously opened up about the guilt over feeling like she "failed as a mother" despite reconciling with her sons after years of estrangement.

Though Sean and Jayden live in Hawaii with their father and Britney's ex, Kevin Federline, the two are said to be on better terms with their mother, especially after her recent DUI arrest.