Carrie Backs Vitaminwater

4/18/2008 Meaghan Mitchell   Vitaminwater will have one of country music's hottest stars backing their product.  Carrie Underwood will appear in upcoming commercials promoting a limited-edition bottle this summer. Carrie told CMT.com, "Vitaminwater "energy" happens to be my favorite flavor, I'm thrilled to have my name on it."  Carrie joins fellow American Idol winner Kelly Clarkson in endorsing this product, as well as 50 Cent and LeBron James, as celebrity partners. "I have a hectic schedule, and Vitaminwater really helps to keep me going," Underwood said. "I like to have a lot of energy on stage, and since Vitaminwater "energy" happens to be my favorite flavor, I'm thrilled to have my name on it."