Celebrity Parents Carrie Underwood Shares Family Halloween Photo with Mike Fisher and Sons Isaiah, 6, and Jacob, 2 "I’m not sure what 3 out of 4 us are supposed to be, but HAPPY HALLOWEEN!" the singer teased on Instagram By Georgia Slater Georgia Slater Twitter Georgia Slater is a writer/reporter on the Parents team at PEOPLE. People Editorial Guidelines Published on November 2, 2021 02:48 PM Share Tweet Pin Email Photo: Carrie Underwood/Instagram Carrie Underwood's crew got all dressed up for Halloween! On Monday, the singer, 38, shared a snap to Instagram from her Halloween weekend, featuring her family of four in their costumes while sitting on a set of steps together. In the photo, Underwood and husband Mike Fisher sit next to their two sons, Isaiah Michael, 6½, and Jacob Bryan, 2½, who are both dressed head-to-toe in their costumes. The "Blown Away" artist applied skeleton face paint for the spooky holiday, while her husband wore a cowboy hat, son Jacob dressed as Paw Patrol's Marshall the Fire Dog and Isaiah as a scary clown. "I'm not sure what 3 out of 4 us are supposed to be, but HAPPY HALLOWEEN! Be extra spooky and extra safe out there!" Underwood wrote. Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories. See All of the Celebrity Kid Halloween Costumes of 2021 In September, the country artist paid tribute to son Isaiah with a sweet Instagram post as he played in his very first baseball game. First posting a photograph of Isaiah with his back turned to the camera, the little guy could be seen getting ready to head to bat as he sported an adorable jersey bearing his name and the number 10. The "Mama's Song" singer also showed Isaiah on the baseball field, waiting for a ball to come his way with his hand in his glove, in another image. An additional video caught the action as Isaiah swung and hit a pitch. "Isaiah made his baseball debut tonight! I got more nervous watching him than I used to get when I watched his daddy play hockey!" Underwood captioned her post, adding the hashtags, "#ProudMom" and "#KidCanHit.