It was a big weekend for Carrie Underwood. Not only did she make her first documented mom joke, but she was also christened with a new nickname courtesy of her witty 4-year-old son, Isaiah.
It all started when the 36-year-old Grammy winner tested out her new comedy act (J.K., she’s sticking to singing) on Instagram Saturday. She shared a post-workout selfie and paired it with what she called a “total mom joke” and some words of encouragement to fellow parents.