THE way to sing Happy Birthday to You

On the south side of Chicago, my family would always sing a second part of the song Happy Birthday to You. First we would sing the standard:
Happy birthday to you,
Happy birthday to you,
Happy birthday dear Chriiiiiiiiiiis,
Happy birthday to you!
Then immediately after that, we would pick it up a notch, speed up the rhythm of the song and sing, and sing with more intensity this part:
Many more birthdays to you,
Many more birthdays to you,
Many more birthdays dear Chriiiiiiiis,
Many more birthdays to youuuuuuuuuuuuu!
And yes, the "youuuuuuuuu" part would be sung until all the candles are blown out. My family ROCKS! In fact, now when I sing happy birthday with other people, it's always shocking how people do not sing this second stanza. So I quietly sing it to myself, or be a dork and sing it out loud.