Instagram/Carrie Underwood & Nikki TV Carrie Underwood shuts down feud rumors with Nikki Glaser after American Idol guest appearance, calling the comedian "wonderful. May 12, 2026 AceShowbiz - Carrie Underwood is addressing rumors about a supposed conflict with comedian Nikki Glaser after Glaser's guest judging appearance on American Idol. The country singer, 43, spoke out during a May 6 interview with radio host Cody Alan on SiriusXM's The Highway, aiming to dispel the online speculation that the two did not get along.