Kim K and Kanye West celebrate their daughter as she turns 3

North West is 3 years old today and her proud mum Kim Kardashian shared birthday greetings to her "favourite mermaid" on Instagram.

"She promised me she wouldn’t get any bigger. I can’t believe my baby girl is 3 years old today!!!! Northie I love you so much I can’t even explain it! Happy Birthday to my favorite mermaid!" gushed the 35-year-old reality TV star.