2021 CMT Music Awards just keeps getting bigger! Carrie Underwood and Thomas Rhett are just two of the artists expected to take the stage at the awards show next month, CMT announced on Wednesday.Underwood will perform with NEEDTOBREATHE, while BRELAND will join Mickey Guyton. Luke Bryan will also perform, as will Chris Young and Kane Brown, and Kelsea Ballerini and Paul Klein from LANY.