The coach of American singing reality TV show 'The Voice' wrote, "Thank you for making every day so amazing. Happy birthday, Chrissy!".
American TV personality and a family friend, Kris Jenner, also added to comment on the image, writing, "Happy Birthday Chrissy!!!!! Love you"
Chrissy, who is a mom of two children, has been teasing Legend about the 'Sexiest Man Alive' title on Twitter since the news broke earlier this month.
Earlier, in order to teasing John for the title, the model changed her Twitter bio to "currently sleeping with people's sexiest man alive." She wrote "My secret is out. I have fulfilled my dream of having boned 'Sexiest man alive'!! An honor!!!!!"
The couple is proud parents to 18-months-old son Miles Theodore and three-and-a-half-year-old daughter Luna Simone.