Kourtney Kardashian, who welcomed son Mason last December with beau Scott Disick, says Mother's Day took on a whole "new meaning" for her this year.

"I now have an intensive new love in my life that I didn't know existed," she wrote on her web site. "My entire life has new meaning thanks to my perfect little Mason. I also have a new incredible respect for moms, including my own. Being a mom is empowering, selfless, beautiful…so own up to it! I feel so blessed on this Mother’s Day! To all mother’s in the world, I wish you a very happy day!" 

The new mom also revealed her undying love for her own mother, Kris Jenner.

"Mom, thank you for doing your best with all of us every day," she wrote. "I admire your strength. You are beautiful in every way and I love you madly!"

Kourtney, 31, recently told UsMagazine.com that she feels even sexier since the birth of her four-month-old son and that she loves when "he's hysterical and he laughs so hard."

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Her sister Khloe, 25, says she is so proud of the way her sister has transformed. "We of course all had our doubts, especially when you thought you would be breast feeding for the first five years of your son's life LOL, but from the moment Mason was born, you were just a complete natural," she wrote on her web site this weekend. "I have loved every minute of watching your transformation from crazy Kourt to loving mommy, and Mason is so lucky to have you," she went on. "I feel truly blessed that I got to witness this beautiful transition in your life."

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