Happy Mother's Day!

Celebrities took to social media on Sunday to send messages of gratitude to their moms and show off the love they received from their own kids.

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Tyra Banks was one of those lucky ladies, celebrating her first Mother's Day after welcoming son York via surrogate in January.

"I'm hearing, 'Happy Mother's Day' and I can't believe how lucky I am!" she captioned an adorable Instagram that shows her ecstatically holding her baby boy as her mom, Carolyn London, stands by her side beaming. "Of all the fashionable hats I wear, I love being a #mother the most. #HappyMothersDay from me and my mama to all the wonderful women of the world!"

Jessica Alba, who's mom to daughters Haven, 7, and Honor, 4, with husband Cash Warren, showed off some of her fabulous gifts on Snapchat, as well as adorable video of her girls singing to her.

WATCH: Jada Pinkett Smith Gets Sweet Mother's Day Messages From Jaden, Willow and Will


Kourtney Kardashian and Kate Hudson also let us peek at the presents they received from their broods via Snapchat. 

Mom-to-be Candice Swanpoel gave a shoutout to her pal and fellow pregnant model, Behati Prinsloo. "Happy Mother's Day to all the amazing mothers in my life and happy almost mama's day to us @behatiprinsloo ?☺️? so much love already," she wrote on Instagram.

Check out even more wonderful Mother's Day messages from the stars:

Just ahead of Mother's Day, Britney Spears penned an emotional letter to her sons, 10-year-old Sean and 9-year-old Jayden. Break out the tissues before you watch the video below.