LOS ANGELES (Variety.com) — Some use the dawn of a new year to declare what they will be doing in the next 12 months, but Carrie Underwood has used this turn of the odometer to announce what she won’t. The singer took to social media Monday to tell fans that she won’t return as a co-host of the CMA Awards next November, after a successful 12-year run that began in 2008.