"When all 9 sisters are back together," Joy-Anna wrote alongside the footage in a Dec. 22 Instagram post, giving credit to brother James Duggar (one of Michelle and Jim Bob's 10 sons) for capturing the lighthearted moment with the ladies. "I asked my younger brother to video for me and this is what I found...lol."

And she had a question for the matriarch.

"My beautiful mama in the middle," Joy-Anna continued. "How does she not age?"

Indeed, fans couldn't believe how fast time has gone by since Michelle, Jim Bob and their 19 kids first appeared on TLC 16 years ago.

"Seeing Josie this big made me feel a million years old," one commenter wrote. Added another, "Can't believe how old Josie is...I used to watch the show every day and I remember when she was born and how tiny she was."