Kim Kardashian and Kanye West‘s son Saint is being showered with love on his 5th birthday! The 40-year-old SKIMS founder took to Instagram to pen a sweet tribute to her little boy, along with an adorable set of photos snapped on their recent Lake Tahoe getaway. “My baby Saint turns 5 today. One of my life’s soul mates,” Kim began her post, shared on Saturday, Dec. 5.