Miranda Lambert broke some exciting news to her fans on Thursday when she made a big reveal on social media.The country music star took to Instagram with a very glamorous look which is sure to turn heads.MORE: Miranda Lambert's daily diet revealed: how she dropped a dress sizeMiranda posed alongside her Pistol Annie's bandmembers, Ashley Monroe, and Angaleena Presley, to announce the group have recorded their very first Christmas album - and it's being released so soon. Alongside the artwork for