A surprise appearance at the Titans game had country music fans doing a double take when Carrie Underwood stepped onto the field—but it wasn’t just her presence that sparked debate. Carrie Underwood, 41, turned heads with a surprise appearance at an NFL game in Tennessee on Sunday, November 3. The country music icon joined fellow “American Idol” judges Luke Bryan, Lionel Richie, and host Ryan Seacrest at Nissan Stadium, where they attended the game between the New England Patriots and the Tennessee Titans. The “American Idol” crew embraced the Titans spirit, donning team gear and rallying fans…