not joking... I cant remember where I heard that, but I think it is accurate for some reason, rumor has it they recorded the album multiple times.
here is a link...
http://www.celebritystorm.com/mceleb...biography.html
from the page
"RUMOR has it that Michael spent more than $30 million and four years working on Invincible. But if you have to pay that much for the amazing quality of an album, then by all means SPEND SPEND SPEND. Invincible needed some quality control: At 16 tracks and about 77 minutes, the album is fast and hard hitting ....... "
Even if that total does include videos, etc.. it is ludacris....