count by 100 song

My littlest has learned to count by 2's and 5's, but his favorite number is 100.  Why not have a count by 100's song? 

To the tune of "Are You Sleeping?"

100, 200,
300, 400,
500,
600,
700, 800,
900, 1000,
I can count by 100's,
Up to 1000!

He might have a new favorite number soon!