Luke Bryan made a major red-carpet revelation at Wednesday night's (10/18) CMT Artists of the Year event in Nashville. While making his rounds on the red carpet, inquiring minds began noticing that Bryan's wife, Caroline, was now wearing a much larger rock on her ring finger. When People asked Luke about the new bling, he confirmed that the sparkler was, indeed, an upgrade from Caroline's original engagement ring. Bryan revealed that he actually gave Caroline the ring as a gift for their 10th anniversary back in December and joked, "Ten years with me feels like a thousand. It was certainly the least I could do!"