It is always heartwarming to see children express their love and appreciation for their parents. Recently, Carrie Underwood's two sons have a lot of love and admiration for their mom on her special day as they gifted her with two handmade cards. The "Denim & Rhinestones" singer took to her Instagram to share photos of the sweet cards on her Instagram Stories. "4 Things Isaiah loves about me," she captioned the 8-year-old's note in which the boy wrote. "4 Things I Love about Mommy! I love her snuggles, I love her kisses, I love her singing and most of all I love her love!" which was decorated with 3 heart emojis and a big exclamation mark. Carrie Underwood shares more birthday tributes Instagram The 40-year-old also posted photos of her birthday cake tower which was totally made of cheese wheels and a bunch of wines, featuring a "Happy Birthday" topping. "For size context… I believe this is about 70 lbs. of cheese!" the mother of two captioned the post. RELATED: Carrie Underwood Stuns On Stage Wearing Denim Shorts And Rhinestone Boots Earlier in the morning, Underwood shared how she started her birthday with a photo of an omelet, raspberries, and a slice of toast meal on a plate. "Breakfast in bed...," she captioned the post. Her husband, Mike Fisher also shared a birthday tribute to his wife via Instagram. "Happy birthday babe!! The boys and I love you so much!! #happybirthday," he wrote alongside a photo of Underwood posing with her five-tier birthday cake. Instagram Carrie Underwood releases a new song on her birthday The eight-time Grammy Awards winner treated her fans to a new song, "Out of That Truck," for her birthday. "Had some fun in the studio recently and for my birthday, I wanted to share my new song 'Out of That Truck' with all of you!" Underwood wrote in the post. Instagram The singer also shared behind-the-scenes footage of the recording process, where she revealed the inspiration behind the song. "It was like having this memory, nostalgic kind of song, where it's like you kind of can't get over somebody," she said, "but it's because of all the physical marks that you left in a space, being the truck."