It's the big 3-0 for Carrie Underwood! But not according to Carrie. "It's actually not my birthday. It's the first anniversary of my 29th birthday," the singer joked on CMT Radio when asked about her March 10 milestone. "So it's more of an anniversary celebration than a birthday. I mean, I'll still, like, blow out candles and stuff because I want my wish, but it's not a birthday." So … happy … um … not-birthday, Carrie!