Happy Birthday to You

"Happy Birthday to You" is a song sung many times to celebrate someone's birthday.

Normal version

 * Happy Birthday to You
 * Happy Birthday to You
 * Happy Birthday Dear (insert the name of whoever was born on that day)
 * Happy Birthday to You.

Variations
A number of variations have been heard:
 * Happy Birthday to You (Life on the Fast Lane)
 * Happy Birthday, Mr. Burns
 * Happy Birthday, Mr. Smithers
 * Happy Birthday to Me
 * Happy Birthday to Meat

Behind the Laughter
 is a real song.