You're not XX years old, you're YY with Z years of experience.

It took XX years for you to look this good!

Happy XX Birthday for the Y time.

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.