What does Iggy Pop performing on American Idol indicate?

Here it is:
http://www.youtube.com/watch?v=hDQL0Y0TC...

Has Iggy gone even more insane going on this show?
Is American Idol getting, GASP, better or is this just an anomaly?
Is it because Stephen Tyler is on the show?
Some other reason?
Update: I never thought that maybe he needed the money!
Update 2: Edit, Stella, I agree that It didn't look like J-Lo knew who he was and was quite uncomfortable.

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