"I can't believe that my whole family kept this secret from me!" the 24-year-old country singer tearfully exclaimed as she took the mic. "I'm so honored to be at the Opry, but I'm more honored to be here with all the people that I love the most."
Jamie Lynn took to Instagram to call it the "best surprise ever at the most special place ever."
Britney posted a shot with her brother backstage, captioning it, "Before we surprised @jamielynnspears tonight!! So proud of our baby sister ❤❤❤"
It truly was a full family affair, as the Spears girls' parents, Jamie and Lynne, were also on hand, plus Jamie Lynn's husband, Jamie Watson, and her 7-year-old daughter, Maddie.