Move over, Jennifer Aniston - maybe Carrie Underwood should be Smart Water's new spokeswoman!

The cute country singer was on the Late Show with David Letterman and she looks super adorable as usual. The top, the boots, the hair... such a beauty! Unless you're Jessica Simpson, I can't imagine anyone not liking her.

Carrie Underwood singer american idol good morning america jacket blonde

Today she performed on GMA and really gave it her all on stage! Lucky mic.