Who drew all the Batmen?

Some chants heard following Mr. Jim Lee around the streets of Bristol at the 2003 UK Comics Expo:

"If you all love Jim Lee
All love Jim Lee
All love Jim Lee clap your hands"

"Jimmy Lee, Jimmy Lee,
Jimmy Jimmy Lee
When he’s got a pen
He draws Batmen
Jimmy Jimmy Lee"

"Jim Lee is our Leader
Jim Lee is our Leader
La-la-la-la, la-la-la-la"


And, best of all, to the tune of Que Sera Sera:

"Jimmy Lee, Jim Lee
Best artist you’ll ever see
Works exclusively for DC
Jimmy Lee, Jim Lee"