When I was a little boy
Way back home in Liverpool
My mama told me I was great

And then when I was a teenager
I knew that I got something going
My baby told me I was great

Now I'm a man
A woman took me by the hand
And she told me I was great
[ Lyrics from: http://www.lyricsfreak.com/j/john+lennon/im+the+greatest_20812489.html ]
I was in the greatest show on earth
For what it was worth
And now I'm thirty-two
And all I wanna do is boogaloo, hey

Yeah, I look myself in the mirror
I see my wife and kids
And they tell me,"You're great"

And let me introduce to you
The one and only Billy Shears
Ah, she's thirty-two
And all she wants to do is boogaloo, hey

Hey, hey, hey
Hear them say
My mama told me I was great