Carrie Underwood is one proud mama!

During a red carpet interview at last night's Grammys, the 32-year-old country star gushed about her 11-month-old son, Isaiah — and even called him the "sunshine" of her life!

"My little guy is the little sunshine in my world, every single day," she told E! News host Ryan Seacrest before the Monday, Feb. 15 awards show. "He's back at the hotel right now and he's just smiley and sweet and happy and just… he's the best."

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Carrie and her professional hockey player hubby, Mike Fisher, 35, welcomed Isaiah — their only child — in February 2015. The couple first met in 2008 and started dating soon after. They later married in July 2010.