Carrie Underwood certainly has a lot to smile about this holiday season. The newly engaged 26 year-old country singer turned up at her fiancé Ottawa Senators hockey player Mike Fisher’s game last night flashing some major sparkle on her left hand. A spokesperson from the Diamond Information Center estimates the brilliant round diamond comes in at whopping five-plus carats, with an estimated value of close to $150,000. Whew! Underwood, who famously declared her affection for her beau in the liner notes of her recent album, Play On (“I love you so much!” she wrote. “You make my life better in every way! I thank God for you every day.”), accepted Fisher’s proposal on Sunday, following a year-long courtship.