Now, the all-star duo is reuniting for some fun in Nashville, Tennessee. Click through the gallery to see Derek and Kellie at The Grand Ole Opry yesterday (June 4), where they were seen making a toast with some champagne, enjoying cupcakes with "10s" on them, and more!
Kelly looked dazzling in a tight purple dress and Derek went for a cute casual look in a button-up and jeans.
How much do you love this talented pair? Let us know in the comments below!