VIDEO : Kanye West And Kim Kardashian Celebrate Their 4-Year-Anniversary

Kanye West and Kim Kardashian recently had their four year anniversary, and fans loved West's touching tribute to Kardashian. He tweeted, "Gratitude and happiness best describe what my wife means to me. I'm deeply gratefully and purely happy." Kardashian also tweeted a photo of her newly blonde hair, saying she did it honor of their anniversary. Blonde hair is West's favorite.