Nope, I'm not going to divulge what they are.
My good friend, Sherry, sang me the birthday song that her husband's family always sings at birthday parties, which made me think of the song MY family sings at every birthday. The words go like this:
Oh somebody had a birthday,
Our little [insert name here] dear.
May Heavenly Father bless you
Throughout the coming year.
Happy birthday to you,
Happy birthday to you!
Happy birthday dear [insert name here],
Happy birthday to you!
Then comes the ceremonious blowing out of the birthday candles, and making of wishes.

I don't know where the song came from. I suppose I should ask someone!
What are your birthday songs of choice?