Here’s to you! 4. A one-of-a-kind birthday message for a one-of-a-kind gal. May all your birthday wishes come true this year. 5. You’re truly a ray of sunshine in my life. Happy birthday, my ...

"It’s a special day for a special lady in my life. Happy birthday @gwenstefani, I’d write a song for you every single day if I could…," Shelton captioned the snap.

1. Happy Birthday to the most amazing person I’ve ever met. I'm so very glad you were born. 2. Happy birthday, babe. I hope your day's as amazing and full of love as you are to me! 3.