10 Things You Didn’t Know About Carrie Underwood

2. That might be Carrie Underwood singing her own song in the grocery store. 

During an interview with Taste of Country, Carrie Underwood admitted she's prone to getting her own songs stuck in her head, and it's embarrassing, "because I sing and I don’t realize it if I’m like in the store or something," she said in 2012. "I’ll whistle or I’ll sing and I don’t even realize that sound is being produced from myself. So I do and then I’m horribly embarrassed."