1.      We can heartly believe it's (name's) birthday!

2.      Happy (age) birthday (name) love (name)!

3.      (Name’s) still a heartthrob at (age) Happy Birthday!

4.      (Name’s) still young at heart! Happy (age) Birthday!

5.      Our hearts go out to (name) she/he’s (age) today! Happy Birthday!

6.      (Name) is a real sweet heart at (age)! Happy Birthday!

7.      My heart beats only for you! Happy (age) Birthday!

These are only suggestions, we can put your own special message on the sign.