Carrie Underwood has had her share of big #1 hits.  But it's always fun to hear her sing someone else's.  And this is really fun.  Earlier this fall, at the CMA Songwriter Series, Carrie Underwood belted out a little of Little Big Town's huge summer blockbuster, "Pontoon."  Take a listen!

We know it was just enough to whet your whistle, but what did you think?