You're only XX for a year, so enjoy it while it lasts.

XX is the new YY

You're only XX once, so enjoy it.

You're not XX years old, you're XX years wise.

You've cleverly disguised yourself as a mature and responsible XX year old, but you're really just a kid at heart.

Blowing out XX candles is good exercise for the lungs.

Hope your XX birthday is a memorable one.

Happy XX birthday, this is when the fun begins.

You're too sexy to be XX.

Happy XX anniversary of your birth.

Woah! XX already? Happy birthday!

Remember, you'll only be XX for a year, but you'll be awesome forever.

So you're XX now... look at the bright side, if that were dog years, you'd be dead already.

What's causing the excitement?

What's causing all the fun?A special boy/girl is XX today.

And you're that lucky one!

Wow, you're already XX. It seems like it was just yesterday you were sitting on the couch all day, playing video games, watching cartoons, and picking your nose. Oh, wait, that was yesterday.

Enjoy this day, you only turn XX once.

You're not XX years old, you're XX years young.