Article continues below advertisementKhloé Kardashian made sure her son Tatum's third birthday was one to remember!Article continues below advertisementThe 41-year-old reality star looked stunning in a curve-hugging yellow dress with a plunging neckline as she threw a full-blown Mickey Mouse Clubhouse-themed bash called "Tatum's Clubhouse."Kardashian completed her look with a delicate cross necklace and kept things casual in a pair of crisp white sneakers.Article continues below advertisementSource: @khloekardashian/InstagramThe mom-of-two wore a tight yellow dress that showed off her curves.