1HappyBirthday.com is Personalized birthday songs.
1 Happy Birthday - a free personalized birthday song
Excerpted from the website description:
- Download your FREE copy of 1 Happy Birthday/Feliz Cumpleaños and listen to it over and over. It is an original Happy Birthday/Feliz Cumpleaños song personalized with your name. It's fun. It's one of a kind. It's wild. It's catchy.
This site has a 60 second original birthday song personalized for over 1,000 names available for download as a free mp3 or the song can be directly played from the site.
You can also find the lyrics to a number of alternative birthday songs in English and Spanish here