… Baby one more time, indeed: Jamie Lynn Spears is going to be a momma twice over! Britney Spears’ little sis confirmed the exciting news on Instagram this morning that her daughter, nine-year-old Maddie, will become a big sister in 2018!

“Looks like we are starting off 2018 with another big milestone,” she wrote. “Sooo happy to announce that Maddie is FINALLY going to be a big sister.”

The post was the 26-year-old’s final installment in a “12 Days of JLS” countdown, in which she shared 12 milestones from her life, including her marriage to husband Jamie Watson in 2014 and the first time she ever performed on the Grand Ole’ Opry stage.

In her most recent upload, Spears also addressed the horrific ATV accident Maddie suffered back in February, which saw her “almost losing” her little girl. “2017 was filled with some of the biggest challenges of my life, as well as some of the biggest blessings, so I made a choice to lay low this year to focus on truly becoming my best self as a person and as an artist,” she wrote.

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❤️3.14.14❤️ #12DaysofJLS

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It appears as though there was some light at the end of her tunnel, however, with the “Sleepover” singer revealing, “During that time, I continued working on my music and telling my story, which has created some of my most honest work and I CAN’T wait to share that with you all very soon.”

She continued on to say that “2018 is going to be filled with many milestones, both personally and professionally. I appreciate each of you for your patience and support through it all. 2018 has a lot coming, so GET READY.”

The baby will be Spears’ first child with Watson.

Congratulations to the happy couple!

What do you think Jamie should name baby number two? Share with us over @BritandCo.

(Photos via Jason Merritt + Michael Loccisano/Getty)